2004-10-18  Matthias Clasen  <mclasen@redhat.com>

	Fix #155658, Sebastian Bacher:

	* gdk/x11/gdkwindow-x11.h (struct _GdkToplevelX11): Add a new
	is_leader flag.

	* gdk/x11/gdkwindow-x11.c (update_wm_hints): Set wm hints on
	leader windows even if they are withdrawn.
	(gdk_window_set_group): Mark the new leader window as such. We
	never remove the flag again, but that should a) be vanishingly
	rare and b) not a problem, since the flag just turns off an
	optimization.

	* gdk/x11/gdkdisplay-x11.c (gdk_display_open): Mark the default
	leader window as such.