stage: Sometimes really force a full redraw
stage: Sometimes really force a full redraw

Since clutter_actor_queue_redraw now automatically clips redraws
according to the paint volume of the actor we have to be careful to
ensure we really force a full redraw when the stage is allocated a new
size or the stage viewport changes.

heysion/clutter-clone,djdeath/clutter,GNOME/clutter,djdeath/clutter-multithreaded,djdeath/clutter,nobled/clutter,jigpu/clutter,kerrickstaley/clutter-vala,collects/clutter,ebassi/clutter,Distrotech/clutter,dlespiau/clutter,spatulasnout/clutter,spatulasnout/clutter,collects/clutter,heysion/clutter-clone,GNOME/clutter,dlespiau/clutter,djdeath/clutter,Distrotech/clutter,djdeath/clutter-multithreaded,collects/clutter,ebassi/clutter,djdeath/clutter-multithreaded,GNOME/clutter,ebassi/clutter,djdeath/clutter-multithreaded,djdeath/clutter-android,jigpu/clutter,spatulasnout/clutter,Distrotech/clutter,GNOME/clutter,jigpu/clutter,djdeath/clutter-android,collects/clutter,djdeath/clutter-android,djdeath/clutter-android,nobled/clutter,heysion/clutter-clone,kerrickstaley/clutter-vala,Distrotech/clutter,GNOME/clutter,kerrickstaley/clutter-vala,jigpu/clutter,jigpu/clutter,nobled/clutter,jigpu/clutter,djdeath/clutter,ebassi/clutter,djdeath/clutter,Distrotech/clutter,djdeath/clutter,heysion/clutter-clone,spatulasnout/clutter,heysion/clutter-clone,kerrickstaley/clutter-vala,ebassi/clutter,djdeath/clutter-android,Distrotech/clutter,collects/clutter,dlespiau/clutter,spatulasnout/clutter