x11: Improvide debugging output a bit
x11: Improvide debugging output a bit

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