2004-06-13  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpdata.[ch]: added "gint freeze_count" and
	gimp_data_freeze()/thaw() functions. Emit "dirty" only if
	freeze_count either is 0 or drops to 0.

	* app/core/gimpbrushgenerated.[ch]
	* app/core/gimpgradient.[ch]: removed freeze/thaw stuff that
	was duplicated in these two subclasses and use the new
	GimpData API instead.

	* app/widgets/gimpbrusheditor.c
	* app/widgets/gimpgradienteditor.c: changed accordingly.