compositor: Damage sprite surface on attach
compositor: Damage sprite surface on attach

Normally the client is responsible for damaging the surface after attach,
but the sprite surface is an internal surface.

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