clutter-offscreen-effect: use target size when setting up the viewport
clutter-offscreen-effect: use target size when setting up the viewport

https://bugzilla.gnome.org/show_bug.cgi?id=650650

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