2001-01-24  Sven Neumann  <sven@gimp.org>

	* app/tools/airbrush.c
	* app/tools/by_color_select.c
	* app/tools/color_picker.c: include gimpcolor/gimpcolor.h

	* libgimpcolor/gimprgb.c: optimized compositing functions.

	* plug-ins/Lighting/lighting_preview.c
	* plug-ins/MapObject/mapobject_preview.c: use gimp_rgb_composite
	functions instead of doing the blending manually

	* plug-ins/MapObject/map_object_shade.c: fixed a rendering bug when
	transparent_background == FALSE