2003-09-17  Michael Natterer  <mitch@gimp.org>

	Added nomis' favorite feature ;)

	* app/paint/gimppaintcore.[ch]: added gimp_paint_core_cancel()
	which can be called instead of gimp_paint_core_finish().
	It simply copies core->undo_tiles back to the drawable instead of
	pushing them to the undo stack.

	* app/tools/gimppainttool.c (gimp_paint_core_button_release): call
	_cancel() instead of _finish() if the right mouse button is
	pressed.