state: Fix the usage of ClutterAnimator in ClutterScript
state: Fix the usage of ClutterAnimator in ClutterScript

Fix the transition parser to allow transitions that have only an
animator and no keys defined.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2325

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