event: Fix up clutter_event_copy()
event: Fix up clutter_event_copy()

We need to copy the scroll axis data, and we need to copy the private
Event data from the source event to the target event structure.

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