actor: Do not call get_opacity() from get_paint_opacity()
actor: Do not call get_opacity() from get_paint_opacity()

We already have access to the opacity private field, there's no need to
go through the public API.

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