2002-02-23  Michael Natterer  <mitch@gimp.org>

	* app/undo_types.h
	* app/undo.[ch]: added new undo type IMAGE_TYPE_UNDO along with
	undo_push_image_type(), removed undoing the base_type from
	IMAGE_SIZE_UNDO. Hacked the undo_names a bit.

	* app/core/gimpimage-convert.c: call undo_push_image_type().

	This removes lots of unneeded invalidations on type/size undo.