[Bug 676362] _gdk_quartz_image_copy_to_image always returns black for the root window
[Bug 676362] _gdk_quartz_image_copy_to_image always returns black for
the root window

Revised patch which doesn't depend upon NSRect being typdeffed from
CGRect (64-bit only).

Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2,Distrotech/gtk,johne53/MB3Gtk-2,johne53/MB3Gtk-2,johne53/MB3Gtk-2,Distrotech/gtk,johne53/MB3Gtk-2,Distrotech/gtk