Don't pass NULL pointer as user data to signal handler
Don't pass NULL pointer as user data to signal handler

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