launcher: Don't leak tty file descriptor on error
launcher: Don't leak tty file descriptor on error

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