2007-01-30  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpguideundo.c
	* app/core/gimpimageundo.c
	* app/core/gimplayerpropundo.c
	* app/core/gimpsamplepointundo.c
	* app/core/gimpdrawableundo.c
	* app/core/gimpitempropundo.c
	* app/core/gimpchannelpropundo.c
	* app/core/gimpchannelundo.c
	* app/core/gimpitemundo.c: chain up last in GimpUndo::free(), use
	switch() in place of if/else when there is more than one undo type
	implemented in one file, g_assert_not_reached() in default:, some
	minor cleanups.


svn path=/trunk/; revision=21817