2003-05-20  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpimage-undo-push.c (undo_pop_layer_mod): call
	gimp_layer_invalidate_boundary() because the layer extents may
	change.

	* app/core/gimpitem-linked.c: pass clip_result == TRUE when
	rotating linked channels.

	* app/core/gimpdrawable-transform.c: implement clip_result so
	linked channels can be rotated without leaving the image in an
	inconsistent state. Added utility function
	gimp_drawable_transform_rotate_point().