2005-08-07  Michael Natterer  <mitch@gimp.org>

	* app/core/gimplayer.[ch] (gimp_layer_flatten): new function.

	* app/actions/layers-actions.c
	* app/actions/layers-commands.[ch]
	* app/widgets/gimphelp-ids.h
	* menus/image-menu.xml.in
	* menus/layers-menu.xml: added "Remove Alpha Channel" action,
	action callback, help ID and menu items. Fixes bug #309762.