Redo Xft support to go directly to Picture objects instead of using

Redo Xft support to go directly to Picture objects instead of using

Mon Nov  5 12:46:44 2001  Owen Taylor  <otaylor@redhat.com>

	* gdk/x11/gdkdrawable-x11.[ch] gdk/x11/gdkgc-x11.c
	gdk/x11/gdkpixmap-x11.c gdk/x11/gdkprivate-x11.h
	gdk/x11/gdkwindow-x11.c: Redo Xft support to go
	directly to Picture objects instead of using XftDraw.
	This fixes the problem where we weren't able to
	properly destroy XftDraw objects before destroying
	the accompanying windows, and probably improves
	efficiency a bit too. (#50214)