desktop-shell: Make surface_touch_move take a touch instead of a seat

It never actually needs the seat, and we always verify the touch pointer
before calling it, so let's just pass a touch pointer instead of having
an assumption that the seat's touch pointer has been verified.

Reviewed-by: Jonas Ã…dahl <jadahl@gmail.com>
Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
1 file changed