2004-08-09  Michael Natterer  <mitch@gimp.org>

	Applied (slightly modified) patch from Shlomi Fish which adds a
	progress bar to the RGB -> INDEXED conversion. Fixes bug #145274

	(and shows that we really really need a GimpProgressInterface in
	the core to give progress users full access to the progress API)

	* app/core/gimpimage-convert.[ch]: added special
	GimpImageConvertProgress function typedef to cope with the
	different stages of converting.  Support passing such a callback &
	data to gimp_image_convert() and update the progress accordingly.

	* app/gui/convert-dialog.[ch]: added a convert progress callback
	and pass it to gimp_image_convert().

	* app/actions/image-commands.c
	* tools/pdbgen/pdb/convert.pdb: changed accordingly.

	* app/pdb/convert_cmds.c: regenerated.