2004-07-05  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpchannel.[ch]: added signal "color-changed" and emit
	it in gimp_channel_set_color() and gimp_channel_set_opacity().

	* app/core/gimpimage-qmask.[ch]: added new functions
	gimp_image_set,get_qmask_color().

	* app/core/gimpimage.[ch]: install a "color-changed" handler on
	gimage->channels and update gimage->qmask_color when the qmask's
	color changes. Fixes bug #145361.

	* app/actions/qmask-commands.c: use the new qmask color API.