libraries/tkimg: Fix build failure.

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

libraries/tkimg/tkimg.SlackBuild

@@ -81,6 +81,12 @@ find -L . \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
 make distclean
+# Disable JBIG support (if left enabled then the build will fail with a
+# link error for JBIG iff the Slackbuilds jbigkit is already installed
+# before building tkimg).  Note that the result is no JBIG support, but
+# there is no JBIG support from a normal build of tkimg if jbigkit is
+# not preinstalled.  sed command courtesy of B. Watson <urchlay@slackware.uk>
+sed -i 's,--disable-pixarlog,& --disable-jbig,' libtiff/configure
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \