2000-09-29  Michael Natterer  <mitch@gimp.org>

	* app/brush_edit.[ch]
	* app/brush_header.h
	* app/gimpbrush.[ch]
	* app/gimpbrushgenerated.[ch]
	* app/gimpbrushlist.[ch]
	* app/gimpbrushpipe.[ch]
	* app/gimpcontext.h
	* app/gimplist.[ch]
	* app/gimpobject.[ch]
	* app/gimpset.[ch]
	* app/gimpsignal.[ch]
	* app/parasitelist.h: Lotsa fixes in the brush referencing code
	and cleanups in many GtkObjects:

	- Reference brushes correctly (call gtk_object_sink() after adding
	  them to the brush list). Don't crash when renaming a brush
	  multiple times.
	- Replaced all gtk_object_destroy() with gtk_object_unref|sink().
	- Removed the "Fake Gimp object system" (gimp_object_destroy() et.al.)
	  all over the place (while it's a good idea to have a common Gimp
	  base object, it's totally useless to try to imitate Gtk's object
	  system).
	- s/sz_BrushHeader/sizeof(BrushHeader)/g
	- And of course various indentation and coding style paranoia changes
	  in all files I visited.