[texture] Do not mix fixed point and units values
[texture] Do not mix fixed point and units values

Like we did for ClutterActor in commit cdb78ec4, fix ClutterTexture
usage of CoglFixed and ClutterUnit values without conversion between
the two types.

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