Account for the fact that Xlib expects format == 32 to be a long, even on

Account for the fact that Xlib expects format == 32 to be a long, even on

Sun Feb 21 15:59:55 1999  Owen Taylor  <otaylor@redhat.com>

	* gdk/MwmUtil.h gdk/gdkwindow.c: Account for the
	fact that Xlib expects format == 32 to be a long,
	even on 64-bit architectures.

	[ patch from George Lebl (jirka@5z.com) ]