Add a gc_changed argument, and avoid setting the clip region if the gc has

Add a gc_changed argument, and avoid setting the clip region if the gc has

2006-02-19  Matthias Clasen  <mclasen@redhat.com>

	* gdk/gdkgc.c (_gdk_gc_update_context): Add a gc_changed
	argument, and avoid setting the clip region if the gc
	has not changed.

	* gdk/gdkgc.c: Update all callers.

	* gdk/gdkpango.c (get_cairo_context): Avoid updating the
	context if nothing changed.