* app/gimpimage.h: guide types used to start at 1, so make them
start at 1
* tools/pdbgen/enums.pl
* app/guides_cmds.c: autogenned files reflect above change
-Yosh
* app/edit_selection.c: removed some nonfunctional code.
* app/paint_core.c: remove the alt toggles perfectmouse behaviour.
* app/paintbrush.c: when ctl (or alt) is held set the fg (or bg) color.
* app/gimpparasite.[ch]: made char *name parameters const.
* app/parasitelist.c: removed unused static variable.
* app/gimpdrawable.c, app/gimpimage.c, app/undo.[ch]: added
support for undoing parasite changes.
* libgimp/gimp.h, libgimp/gimpimage.c: added
gimp_undo_push_group_start and gimp_undo_push_group_end
* libgimp/parasite.[ch]: added undoable flag.
* plug-ins/gdyntext/font_selection.c: fixed c++ style comment.
* plug-ins/gdyntext/gdyntext.c: use the new undoable parasites.
* plug-ins/rcm/rcm_misc.c: arctg can't be inline because it is
used in other .c files
* plug-ins/waterselect/waterselect.c,
* plug-ins/rotators/rotators.c, app/tips_dialog.c, app/plug_in.c:
fixed some warnings
1999-04-22 Michael Natterer <mitschel@cs.tu-berlin.de>
First version of per-tool paint options. No PDB interface yet.
The tool options dialog got rather big when in per-tool mode, so
it will probably have to become a notebook.
It's not yet 100% consistent. If switched off, everything should
behave exactly like before.
* app/Makefile.am
* app/paint_options.h: new file
* app/tool_options.c: PaintOptions gui. Maintain a list of all
paint tools' ToolOptions to enable switching between global and
per-tool paint options.
* app/brush_select.[ch]: changed packing boxes, tables, ...
The paint options in the brush selection can be hidden now.
Moved create_paint_mode_menu() to paint_options.h and
tool_options.c and renamed it to paint_mode_menu_new().
* app/gimage_mask.c
* app/gimpbrush.[ch]
* app/gimpbrushlist.[ch]
* app/paint_core.c: moved gimp_brush_[set|get]_spacing() from
gimpbrushlist.[ch] to gimpbrush.[ch].
Moved gimp_brush_[get|set]_[opacity|paint_mode]() to
paint_options.h and tool_options.c and renamed them to
paint_options_*_*(). They are "global paint options" now.
* app/airbrush.c
* app/blend.c
* app/bucket_fill.c
* app/clone.c
* app/convolve.c
* app/eraser.c
* app/ink.c
* app/paintbrush.c
* app/pencil.c: all paint tools' options are derived from
"PaintOptions" now. Opacity and paint mode are obtained through
macros which take into account the current paint options mode.
* app/buildmenu.h: #include <gtk/gtk.h>
* app/color_picker.c
* app/text_tool.c: changed spacings.
* app/gimprc.[ch]: new gimprc option "global-paint-options"
* app/preferences_dialog.c: Added a "Tool Options" page. Code
cleanup. Some work on the convenience constructors test site.
* app/tools.c: fixed "unused variable" warning.
Tue Apr 20 23:38:26 BST 1999 Austin Donnelly <austin@gimp.org>
* app/bezier_select.c: add the new args to gimp-paintbrush PDB
calls.
* app/blend.c
* app/bucket_fill.c
* app/invert.c: check return from procedural_db_run_proc() rather
than dereferencing NULL.
* app/paintbrush.c: plumb the non-gui fade_out option into the
functions that actually do the work, rather than using
an uninitialised value.
* app/procedural_db.c: better error messages on PDB typecheck fail
in procedural_db_run_proc. Also now valid to
procedural_db_destroy_args() on a NULL pointer.
* app/procedural_db.h: pdb_type_name() function added, plus
comment urging people to keep the enum and strings in step.
* tools/pdbgen/README: added paragraph on how to run pdbgen.pl
* tools/pdbgen/pdb/tools.pdb: fade_out parameter is valid to be 0
* app/tools_cmds.c: new version of generated file
1999-04-18 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/paintbrush.c: fixed a sensitive setting bug I introduced
with the last change.
* app/text_tool.c: added a toggle button which enables calling
gDynText.
* app/tool_options.c: the toggle callback does some more sensitive
settings.
Tue Apr 13 22:17:23 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/bezier_select.c
* app/bezier_select.h
* app/pathsP.h
* app/paths_dialog.c
* app/transform_core.c
* app/transform_core.h
* app/undo.c
New:-
* pixmap/locked.xpm
New image. (Your welcome to improve upon it...)
Paths can now be locked down for transformations. Click next to the
paths preview and a icon will appear. This path will "locked" during
transformations (via the transforms tool). Undo for these path
transformations is also available.
Fixed bug when creating a path for the first time when no paths dialog
visible.
1999-04-12 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/airbrush.c
* app/bezier_select.c
* app/blend.c
* app/brightness_contrast.c
* app/bucket_fill.c
* app/by_color_select.c
* app/clone.c
* app/color_balance.c
* app/color_picker.c
* app/convolve.c
* app/crop.c
* app/curves.c
* app/ellipse_select.c
* app/eraser.c
* app/flip_tool.c
* app/free_select.c
* app/fuzzy_select.c
* app/histogram_tool.c
* app/hue_saturation.c
* app/ink.c
* app/iscissors.c
* app/levels.c
* app/magnify.c
* app/move.c
* app/paintbrush.c
* app/pencil.c
* app/posterize.c
* app/rect_select.[ch]
* app/text_tool.c
* app/threshold.c
* app/transform_tool.c
* app/tools.[ch]
* app/toolsF.h: again: all tools :(
* app/Makefile.am
* app/tool_options.[ch]
* app/selection_options.h
* app/tool_options_ui.h: new files.
Ok, this time it's general enough for future extensions:
- The tool options structures are organized like the gtk object
system to allow derived tool options.
- Renamed all create and reset functions to *_options_new() and
*_options_reset() to reflect this.
- Changed tools_register() again. Now it takes just a pointer to a
ToolOptions structure.
- Moved almost the entire tool options gui code to tool_options.c.
- Visually separated the common selection options from the
tool-specific ones. I'd like to do the same with opacity/paint
mode in all paint tool options but I think this needs some more
discussion.
* app/histogram_tool.c: changed packing boxes, label alignments.
* app/paintbrush.c: some more sensitive settings. The gradient
feature can now be toggled with a button. Hopefully didn't break
anything.
* app/Makefile.am: build color_cmds, lut_funcs, and pixel_processor
* app/app_procs.c: feedback in the splash screen when loading
parasites.
* app/boundary.c: Optimized find_empty_segs.
* app/brightness_contrast.[ch]
* app/levels.[ch]
* app/posterize.[ch]:
moved pdb and lut calculation code. These files now contain only
GUI functions.
* app/channel.c: Optimized channel_bounds (fewer compares, better
use of registers). Use color_region instead of channel_*_segment
in channel_combine_rect. Optimized channel_combine_ellipse by
skipping pixels inside of the ellipse. Use
pixel_region_process_parallel in channel_combine_mask. Use a
GimpLut in channel_invert, and channel_sharpen.
* app/invert.c
* app/equalize.c: moved the lut functions to lut_funcs.c
* app/gimpdrawable.c, app/gimpdrawableP.h
* app/gimpimage.c, app/gimpimageP.h: removed unused gimpmatrix
variables/includes.
* app/gimplut.[ch]: added new function gimp_lut_process_inline
that operates on a single PixelRegion.
* app/gimpparasite.[ch]: new functions to save/load parasiterc
* app/parasitelist.[ch]: new functions to save/load ParasiteLists
in/from files.
* libgimp/parasite.[ch]: new functions to load/save parasites.
* app/internal_procs.c: get some procs from new location in
color_cmds.h.
* app/pixel_region.[ch]: moved pixel_regions_process_parallel
related functions to a new file.
* app/color_cmds.[ch]: new files for PDB
definitions/implementations of color correction functions.
* app/lut_funcs.[ch]: new files to hold lut creation functions.
* app/pixel_processor.[ch]: new files that contain the
pixel_regions_process_parallel routines. Added some new
capabilities that are currently unused.
1999-04-08 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/airbrush.c
* app/bezier_select.c
* app/blend.c
* app/brightness_contrast.c
* app/bucket_fill.c
* app/by_color_select.c
* app/clone.c
* app/color_balance.c
* app/color_picker.c
* app/convolve.c
* app/crop.[ch]
* app/curves.c
* app/ellipse_select.c
* app/eraser.c
* app/flip_tool.c
* app/free_select.c
* app/fuzzy_select.c
* app/histogram_tool.c
* app/hue_saturation.c
* app/ink.c
* app/iscissors.c
* app/levels.c
* app/magnify.c
* app/move.c
* app/paintbrush.c
* app/pencil.c
* app/posterize.c
* app/rect_select.[ch]
* app/text_tool.[ch]
* app/threshold.c
* app/transform_tool.c
* app/tools.[ch]
* app/toolsF.h: in other words: all tools
Implemented the "reset tool options" feature.
- All tools register with a title string and a reset function now.
- The tool options' variables have two related <var>_d (default)
and <var>_w (widget) variables to restore the default values.
"Standardized" the tool options UI:
- Put the stuff info a frame to give a hint that the dialog's
contents will change.
- table layout, sensitive setting, spacings, borders, ...
As I had them all in my emacs simultaneously, I couldn't resist to
standardize the tools' *.c files declaration parts ;) Ansi stuff.
Wed Apr 7 22:44:02 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/curves.c
* app/image_map.c
* app/image_map.h
Curves dialog now has "interactive feedback". Press and drag the
mouse button in the image window and a marker will appear in the
curves dialog showing the channel value at that point.
1999-04-06 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/gimpunit.c
* libgimp/gimpunit.[ch]
* libgimp/gimpunitmenu.c
* libgimp/gimpsizeentry.[ch]: enabled "percent" pseudo-unit.
New function gimp_size_entry_set_size() to set the values which
will be treated as 0% and 100%.
* app/crop.c
* app/rotate_tool.c
* app/scale_tool.c: enable "percent".
* app/rect_select.c fixed size selections can be made in units and
percent now, table layout, label adjustment.
1999-04-05 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/action_area.h: #include <gtk/gtk.h>.
* app/devices.c: made the "Input Devices" dialog follow the action
area conventions. Grab pointer in the pattern/brush preview popups.
* app/errorconsole.c: use the actionarea functions.
* app/gimpunit.c: had the wrong copyright header.
* app/info_dialog.c: correctly set the spinbuttons' digits.
* app/perspectice_tool.c: removed #include <stdio.h> again but
didn't forget to s/sprintf/g_snprintf/ this time.
* app/preferences_dialog.c: unified order of varible definitions,
removed some unused variables.
* app/crop.c
* app/file_new_dialog.c
* app/info_dialog.[ch]
* app/interface.c
* app/preferences_dialog.c
* app/rotate_tool.c
* app/scale_tool.c
* libgimp/gimpsizeentry.[ch]
* libgimp/gimpunitmenu.[ch]: prepared for "percent" in size
entries.
1999-04-02 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/gimage_mask.[ch]: made function headers ansi compliant.
* app/file_new_dialog.c
* app/preferences_dialog.c: minor GUI and signal handling
changes. Added a WM hint pixmap to the prefs dialog but commented
it out because it looked ugly. If someone has a nice pixmap,
please try it and tell me ;)
* app/color_picker.c
* app/crop.c
* app/info_window.c
* app/perspective_tool.c
* app/rotate_tool.c
* app/scale_tool.c
* app/info_dialog.[ch]: the info_dialog allows scales, spinbuttons
and sizeentries now. Made some dialogs use these widgets and
added unit support. Sprinkled some g_snprintf's, removed
#include's, ansi issues, ...
* app/session.c: don't call a NULL callback.
* libgimp/gimpsizeentry.[ch]: new function
gimp_size_entry_add_field() which allows a more flexible GUI
layout. More intelligent signal handling.
1999-03-25 Michael Natterer <mitschel@cs.tu-berlin.de>
* unitrc: corrected a typo
* app/commands.c
* app/global_edit.c
* app/gradient.c
* app/interface.[ch]
* app/palette.c
* app/paths_dialog.c: the query_[string|..]_boxes connect their
close callback to a user provided signal now.
* libgimp/gimpimage.c: gimp_image_get_unit() doesn't need a
g_return_if_fail()
* libgimp/gimpunitmenu.c: memory leak & compiler warning
* configure.in
* gimprc.in
* user_install
* user_install.bat
* plug-ins/Makefile.am
* plug-ins/FractalExplorer/*: added the FractalExplorer plugin.
* app/install.c: ditto and made the install help text more
editable by moving it to an array.
* app/paint_funcs.[ch]: Added an edge_lock parameter to
thin_region. Split the radius parameter into xradius and yradius
in thin_region and fatten_region.
* app/channel.c: fixed a bug in channel_bounds that I introduced
last time I tried to fix a bug in channel_bounds. Minor
modifications to work with the improved thin/fatten region
functions.
Sat Mar 20 22:51:51 GMT 1999 Adam D. Moss <adam@gimp.org>
* fileops.c: The file revert operation clears the undo stack
upon a revert to get rid of the actions causedby the open
operation.
Sat Mar 20 21:55:53 GMT 1999 Adam D. Moss <adam@gimp.org>
* disp_callbacks.c: Reduce some possibly-redundant re-renders
on expose.
* gdisplay.c gdisplay.h: Export a function to idly refresh from
the composite buffer without doing a re-render.
1999-03-16 Michael Natterer <mitschel@cs.tu-berlin.de>
* app/gdisplay.h: double the length of the cursor_format_str as
users may define strange units now
* app/xcf.c: forgot a sanity check when loading/saving the user
unit property
1999-03-16 Michael Natterer <mitschel@cs.tu-berlin.de>
This implements the rest of the unit system (unitrc loading and
saving and full PDB interface)
* Makefile.am
* gimp.1
* user_install
* user_install.bat
* unitrc: new file (default unit database) and some documentation
* app/Makefile.am
* app/gimpunit.c
* app/gimpunit_cmds.h
* app/unitrc.h: new files enabling the unit database and PDB
access to the unit system
* app/app_procs.c: parse and save unitrc
* app/gimprc.[ch]: enable unit parsing. New function
init_parse_buffers() to enable unitrc to be loaded before gimprc
* app/gimage_cmds.[ch]: new PDB procedures which set/return an
image's unit
* app/install.c: mention unitrc installation
* app/xcf.c: new xcf property for user defined units. An image's
unit is saved as either an integer ID (built in units) or as
a full unit definition without any ID
* libgimp/Makefile.am: moved gimpunit.o from libgimpi.a to
libgimp.a
* libgimp/gimp.h
* libgimp/gimpimage.c: get/set an image's unit with PDB calls
* libgimp/gimpunit.h: this file is now the header for both
app/gimpunit.c and libgimp/gimpunit.c
* libgimp/gimpunit.c: does the unit calls as PDB calls now
* libgimp/gimpunitmenu.[ch]: enable user unit functionality and a
unit selection dialog
* libgimp/gimpsizeentry.c: disble hilighting on focus_in_event and
minor bugfixes
* plug-ins/tiff/tiff.c: set image unit to "mm" if tiff unit is
"cm", save "cm" if image unit is metric
1999-03-12 Michael Natterer <mitschel@cs.tu-berlin.de>
This is mostly unit stuff and code cleanup
* libgimp/gimpi.def: add some functions
* libgimp/gimpsizeentry.[ch]: new function
gimp_size_entry_set_refval_digits() which allows for float pixel
input. SIGFPE bugfix from Yasuhiro Shirasaki
<yasuhiro@awa.tohoku.ac.jp>, minor bugfixes.
* libgimp/gimpunitmenu.[ch]: add a separator after "pixels",
bugfixes.
* app/interface.[ch]: split up the old query_string_box() into
query_[string|int|float|size]_box(). All functions take an
optional GtkObject* parameter and connect to that object's
"destroy" signal, this fixes some segfaults. And a global
s/container_border_width/container_set_border_width/
* app/commands.s: grow, shrink, border, feather now use the
query_size_box. Used MIN(xres,yres) for now for the pixel<->unit
calculations. Fixed some memory leaks.
* app/global_edit.c
* app/gradient.c
* app/palette.c
* app/paths_dialog.c: changed the query_string_box() calls
Fri Mar 5 21:45:39 GMT 1999 Andy Thomas <alt@picnic.demon.co.uk>
This is a bit of a biggy. Added paths to layers & channels
dialog. This is not complete yet (it still has some rough edges ;-)
New:-
* paths_dialog.c
* paths_dialog.h
* pathsP.h
These are the core parts of the paths dialog & interaction.
* tools/penadd.xpm
* tools/pendel.xpm
* tools/pennorm.xpm
* tools/penedit.xpm
* tools/penstroke.xpm
New images found in the dialog. Maybe someone with a better
artistic flair could replace these?
Changed:-
* Makefile.am
Added new files for build
* layers_dialog.c
Added new tab for paths.
* bezier_select.h
* bezier_selectP.h
* bezier_select.c
Rearrangement & fixes. Not finished yet.
* iscissors.c
Header file changes. (Need to include more headers).
* gdisplay.c
* gdisplay.h
Hmmm... Added a function that did a mapping from gimage to gdisp.
This is a little bit of a "hack", but it was needed.. really.
* ops_buttons.h
* ops_buttons.c
Enhanced to create more types of button ops. Used in the paths dialog.
* channels_dialog.c
Header file changes?
* xcf.c
Paths stored in new PROP. Yosh.. I did as you and Adam suggested.
* gimpimage.c
* gimpimage.h
* gimpimageP.h
Added paths items to the image structures.
* app/Makefile.am: added gimphistogram*, histogramwidget*,
removed histogram.[ch]
* app/histogram.[ch]: removed. replaced with histogramwidget.[ch].
* app/{gimphistogramP.h, gimphistogram.h, gimphistogram.c}: new
functions that calculate histograms in parallel and perform
calculations on them.
* app/histogramwidget.[ch]: Same as old histogram.[ch], only it is
now a real widget, and it uses GimpHistograms instead of arrays of
values.
* app/curves.c: #include gimphistogram.h instead of histogram.h.
* app/equalize.c: use GimpHistogram and GimpLut.
* app/gimpbrush.c, app/gimpimage.c, app/gimpset.c: use
GTK_RUN_FIRST in calls to gimp_signal_new.
* app/histogram_tool.c, app/levels.c, app/threshold.c: modified to
use the new HistogramWidget.
* app/paint_funcs.c: removed some unused variables.
* app/preferences_dialog.c: only display the num-processor field
if we are configured --with-mp
* plug-ins/gee/gee.c: removed a couple of c++ style comments.
Sat Feb 27 18:07:53 GMT 1999 Austin Donnelly <austin@gimp.org>
* app/scale.c: use image's units, not the ruler units, when
dimentioning the rulers. Gimprc ruler-units syntax has no
use anymore.
* app/gdisplay.[ch]: applied statusbar unit display patch from
Michael Natterer.
Fri Feb 26 21:19:10 GMT 1999 Adam D. Moss <adam@gimp.org>
* app/convert.c:
Many revisions to the box-cut quantizer used in RGB->INDEXED
conversion. Box to be cut is chosen on the basis of posessing an
axis with the largest sum of weighted perceptible error, rather
than based on volume or population. The box is split along this
axis rather than its longest axis, at the point of error mean
rather than simply at its centre. Error-limiting in the F-S
dither has been disabled - it may become optional again later. If
you're convinced that you have an image where the old dither looks
better, let me know.
Sat Feb 20 16:12:33 CST 1999 Shawn T. Amundson <amundson@gimp.org>
* app/tips_dialog.c: Add default to Cancel button, remove
unset GTK_RECEIVES_DEFAULT from prev/next buttons (they
are like toolbar buttons), changed abreviated prev to
previous, prev/next button are now same size, cancel button
is in a button box. Added vboxes where necessary to prevent
prev/next and check button from filling vertically.
* app/app_procs.c: when splashscreen dialog is larger than the
logo, (due to huge font), center logo.
* app/file_new_dialog.c: patch from Marco Lamb <lm@geocities.com>
disallows resizing, changes vertical expanding of widgets to
not occur
* app/palette.c: patch from Marco Lamb <lm@geocities.com>. Makes
+/- buttons for zoom pixmaps (eventually, these can be replaced
with a magnifying glass with a little +/- I think), so that they
no longer expand as they did before. I modified his patch so it
did not create a misused toolbar. I did some other stuff here too,
moved Close button to the left, made it the window's default,
and unset GTK_RECEIVES_DEFAULT off of the non-bottom buttons.
* app/actionarea.c: another patch from Marco Lamb <lm@geocities.com>.
This one changes buttons to be put in a button box which is right
justified. If we decide later that spread is better, we can
change this easy enough.
* app/tools/zoom_in.xpm, app/tools/zoom_out.xpm: + and - graphics.
* libgimp/gimpunit.h
libgimp/gimpunit.c: New files from Michael Natterer
<mitschel@cs.tu-berlin.de>, gimp_unit_* routines.
* app/gimage.h
app/gimpimage.h
app/gimpimage.c
app/gimpimageP.h
app/xcf.c: Patches from Michael Natterer <mitschel@cs.tu-berlin.de>,
which keep a unit assocated with an image.
done in pieces, don't expect to be able to compile on Win32 from
these sources yet. Ans of course, the official version of GTk+
doesn't include the Win32 stuff yet.
* app/gimplut.[ch]: new source files that implement pixel Look Up
Table functions.
* app/Makefile.am: build gimplut.[ch]
* app/brightness_contrast.c
* app/curves.c
* app/invert.c
* app/levels.c
* app/posterize.c: Use the new lut functions. Use
pixel_region_process_parallel in the PDB versions of these routines.
* libgimp/parasite.h
* libgimp/parasite.c: new functions parasite_name and
parasite_compare.
* app/gimpdrawable.c:
* app/gimpdrawable.h: new function
gimp_drawable_get_color_at(...) returns the RGBA[color index]
value at a specified position in the drawable. Don't set the dirty
bit on the image if a new parasite is the same as the old.
* app/gimpimage.c
* app/gimpimage.h new function
gimp_image_get_color_at(...) returns the RGBA[color index]
value at a specified position in the drawable. Don't set the dirty
bit on the image if a new parasite is the same as the old.
* app/by_color_select.c
* app/color_picker.c: use the new gimp_*_get_color_at
functions instead of messing with the tiles.
* app/layer.c: fixed a minor warning.
* app/commands.c:
don't scale the image if the new size == the old size
* app/channel.c: optimized channel_bounds by only checking the
pixels in a tile if it is not already entirely within the
currently computed bounds.
Sun Feb 14 20:43:55 GMT 1999 Austin Donnelly <austin@gimp.org>
* app/channels_dialog.c: don't #include resize.h - it's not needed
* app/preferences_dialog.c: ditto.
* app/resize.c: do all dialog creation here to factor out lots of
common code in commands.c and layers_dialog.c. Also cancel
resize/scale dialog on destruction/removal of images/layers -
proper fix for Peter Teichman's bug.
* app/resize.h: new prototype for resize_widget_new() - beginnings
of resolution-aware scaling.
* app/commands.c: pull all the resize/scale dialog creation stuff
out to resize.c
* app/layers_dialog.c: same again.
* app/layer.c: add REMOVED signal, sent when a layer is removed
from an image. Layers typically aren't destroyed until their
undo info expires.
* app/layer.h: prototype for layer_removed() call.
* app/gimpimage.c: send out removed signal.
Sun Feb 14 01:27:29 GMT 1999 Austin Donnelly <austin@gimp.org>
New manpage plus bumper fun pack of bugfixes.
* gimprc.5.in: NEW FILE: beginnings of some docs on gimprc file
format.
* configure.in: generate gimprc.5 from gimprc.5.in
* Makefile.am: install gimprc.5
* .cvsignore: ignore gimprc.5, it's auto generated.
* gimp.1: fix a few paths and URLs. Mention the modules/
directory in user's gimpdir.
* app/commands.c: cancel resize or scale dialogs when image
they're for is destroyed, rather than segfaulting when Ok is
clicked. Thanks to Peter Teichman <peter@zeno.dorm.duke.edu>
for pointing this one out. Layer resize/scale still suffers
from same problem, but Adam's working on L&C at the moment.
* app/gdisplay.c: off-by one error on bounds check in making image
title.
* app/module_db.c: some would consider it foolish returning to
code you've just unloaded. So don't do that.
* app/plug_in.c: when superceeding a PDB function with a newer one
of the same name, remove pointers to the old one from the
plugins that originally registered them. Fixes Nick Lamb's
pluginrc file corruption thing, and catches the (common?)
error of copying a plugin to a different name but failing to
change what it registers. Also, if registering a file
loader/saver, make sure it has set an extension, prefix, or
magic number it's interested in - that way code that relies
on checking this doesn't get confused.
Manish Singh