window.c: Use pointer enter serial for setting cursor
window.c: Use pointer enter serial for setting cursor

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