2004-03-16  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpdrawable.c (gimp_drawable_set_tiles): ref new
	tiles before unrefing the old ones.

	* app/core/gimpimage-undo-push.c: keep undo memsize exact by
	adjusting undo->size when the stored data changes.

	* app/core/gimpchannel.[ch] (gimp_channel_new_from_alpha)
	* app/core/gimpchannel-select.[ch] (gimp_channel_select_alpha):
	replaced "layer" parameter by "drawable".

	* app/gui/layers-commands.c
	* tools/pdbgen/pdb/selection.pdb: changed accordingly.

	* app/pdb/selection_cmds.c: regenerated.

	* app/core/gimpchannel.c
	* app/core/gimplayer.c
	* app/core/gimplayermask.[ch]
	* app/core/gimpselection.c: remdom cleanup & code review.