ClutterStageCogl: Ignore a clip the size of the stage
ClutterStageCogl: Ignore a clip the size of the stage

If the clip region includes the entire stage, ignore it - we aren't
actually clipped.

https://bugzilla.gnome.org/show_bug.cgi?id=719901

jigpu/clutter,djdeath/clutter,GNOME/clutter,jigpu/clutter,Distrotech/clutter,djdeath/clutter,djdeath/clutter,jigpu/clutter,GNOME/clutter,Distrotech/clutter,ebassi/clutter,djdeath/clutter,ebassi/clutter,jigpu/clutter,GNOME/clutter,GNOME/clutter,ebassi/clutter,jigpu/clutter,Distrotech/clutter,Distrotech/clutter,ebassi/clutter,djdeath/clutter,Distrotech/clutter,Distrotech/clutter,ebassi/clutter,djdeath/clutter,jigpu/clutter,GNOME/clutter