2008-02-12  Michael Natterer  <mitch@gimp.org>

	* app/gegl/gimpoperationcolorbalance.c
	* app/gegl/gimpoperationcolorize.c
	* app/gegl/gimpoperationcurves.c
	* app/gegl/gimpoperationdesaturate.c
	* app/gegl/gimpoperationhuesaturation.c
	* app/gegl/gimpoperationlevels.c
	* app/gegl/gimpoperationposterize.c
	* app/gegl/gimpoperationthreshold.c
	* app/gegl/gimpoperationtilesink.c
	* app/gegl/gimpoperationtilesource.c: added categories and very
	lame descriptions. Dunno if the categories are good that way but
	at least they are not NULL now.


svn path=/trunk/; revision=24876