Fix clutter_event_get_coords() for crossing events
Fix clutter_event_get_coords() for crossing events

The ClutterCrossingEvent data structure contains the coordinates
of the crossing; they are regularly filed out by Clutter and by
the backend event processing code. And yet clutter_event_get_coords()
returns (0, 0) because it thinks that CLUTTER_ENTER and CLUTTER_LEAVE
events do not have coordinates.

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