Fix the warnings for Animation::update_interval()
Fix the warnings for Animation::update_interval()

The bindings for update_interval() were copied from bind().

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