2007-01-28  Michael Natterer  <mitch@gimp.org>

	* app/core/Makefile.am
	* app/core/core-types.h
	* app/core/gimpimageundo.[ch]: new undo class which handles
	GIMP_UNDO_IMAGE_TYPE, GIMP_UNDO_IMAGE_SIZE and
	GIMP_UNDO_IMAGE_RESOLUTION.

	* app/core/gimpimage-undo-push.c: use the new undo class and
	remove the resp. code here.

	* app/core/gimpimage-undo.h: changed include guards to not
	conflict with gimpimageundo.h


svn path=/trunk/; revision=21789