actor: Clean up the allocate() checks
actor: Clean up the allocate() checks

Move the conditions to their own boolean flags, to avoid making the
if() incomprehensible.

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