Use a different approach to snapshotting that is in line with what is done

Use a different approach to snapshotting that is in line with what is done

        * gtk/gtkwidget.c (gtk_widget_get_snapshot): Use a different approach
        to snapshotting that is in line with what is done in the client-side
        windows branch, and that works for widgets regardless if they are
        double-buffered or not. Patch by Alex Larsson.

        * gdk/gdkwindow.c (_gdk_window_calculate_full_clip_region): Clip
        to the parent.

svn path=/trunk/; revision=22187