2004-11-18  Michael Natterer  <mitch@gimp.org>

	* plug-ins/common/compressor.c (compressors): added back the
	.xcf.gz and .xcf.bz2 extensions because they are the only way
	to figure the special nature of this plug-in's extensions.

	* app/widgets/gimpfileprocview.[ch]: keep a list of "meta
	extensions" (extensions which have a '.' themselves).

	* app/widgets/gimpfiledialog.c (gimp_file_dialog_proc_changed):
	try to replace the whole extension if the last extension is one of
	the meta extensions kept by GimpFileProcView. Fixes bug #158377.