2001-05-01  Michael Natterer  <mitch@gimp.org>

	* app/gimpimage.h: removed prototype of function which doesn't
	exist.

	* app/widgets/gimppreview.[ch]: new signal "extended_clicked"
	which is emitted instead of "clicked" if the user pressed shift,
	control or mod1 on button_press.

	* app/widgets/gimplayerlistitem.c: use the "extended_clicked"
	signal to toggle the layer mask's "show" and "apply" states.