compositor: Address blending for XRGB surfaces with alpha < 1.0.
compositor: Address blending for XRGB surfaces with alpha < 1.0.

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