2004-04-13  Michael Natterer  <mitch@gimp.org>

	GimpItem undo group cleanup in preparation of fixing bug #138356:

	* app/core/core-enums.[c]: renamed LAYER_SCALE and LAYER_RESIZE
	undo groups to ITEM_SCALE and ITEM_RESIZE.

	* app/core/gimpitem.[ch]: always push undo groups around
	GimpItem::translate(), scale(), resize(), flip(), rotate() and
	transform(). Added the resp. undo_desc strings to GimpItemClass.

	* app/core/gimpchannel.[ch]
	* app/core/gimpdrawable.[ch]
	* app/core/gimplayer.c: removed all undo groups from
	implementations of the above methods. Removed the undo_desc
	strings which were moved to GimpItemClass.

	* app/core/gimpimage-crop.c
	* app/core/gimpselection.c
	* app/gui/layers-commands.c
	* app/vectors/gimpvectors.c
	* tools/pdbgen/pdb/layer.pdb: changed accordingly.

	* app/pdb/layer_cmds.c: regenerated.