desktop/pidgin-window_merge: Fix github tarball handling.

Signed-off-by: Andrew Clemons <andrew.clemons@gmail.com>

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

desktop/pidgin-window_merge/pidgin-window_merge.SlackBuild

@@ -75,7 +75,12 @@ rm -rf $PKG
 mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
 rm -rf window_merge-$VERSION
-tar xvf $CWD/window_merge-$VERSION.tar.gz || tar xvf  $CWD/$VERSION.tar.gz
+# respecting content-disposition may include cgi params in the filename
+TARBALL=$CWD/window_merge-$VERSION.tar.gz
+if [ ! -e $TARBALL ]; then
+  TARBALL="$(/bin/ls $TARBALL\?* | head -1)"
+fi
+tar xvf $TARBALL
 cd window_merge-$VERSION
 chown -R root:root .
 find -L . \