Fix signature for pointer motion event.
Fix signature for pointer motion event.

eyolfson/wayland,abooij/wayland,abooij/wayland,Fantu/compositor-spice,Gnurou/weston,bitfactor/wayland,tulcod/wayland,mchalupa/wayland,krezovic/weston,sir-murray/wayland,jonnylamb/weston,tulcod/wayland,eyolfson/wayland,giucam/weston,eyolfson/weston,mchalupa/wayland,krezovic/weston,xorgy/weston,Fantu/compositor-spice,sir-murray/weston,sir-murray/weston,Gnurou/weston,mchalupa/wayland,eyolfson/wayland,kwm81/weston,giucam/weston,xorgy/weston,mchalupa/weston,sir-murray/wayland,kwm81/weston,bitfactor/wayland,udoprog/weston,Tarnyko/weston-xdg_surface_present,sir-murray/wayland,abooij/wayland,mchalupa/weston,eyolfson/weston,bitfactor/wayland,tulcod/wayland,udoprog/weston,Fantu/compositor-spice,Tarnyko/weston-xdg_surface_present,jonnylamb/weston