xwayland/window-manager.c: Use container_of to get the wm pointer since window may be NULL.
xwayland/window-manager.c: Use container_of to get the wm pointer since window may be NULL.

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