wayland-server: Don't close display fd in fatal error handler
wayland-server: Don't close display fd in fatal error handler

We can't do that there, we have to make sure it stays a valid fd until
the application calls wl_display_disconnect().  Otherwise the application
may end up poll()ing on a stale or wrong fd in case another part of the
application (or another thread) triggered a fatal error.

sir-murray/wayland,mchalupa/wayland,abooij/wayland,eyolfson/wayland,tulcod/wayland,abooij/wayland,bitfactor/wayland,bitfactor/wayland,tulcod/wayland,mchalupa/wayland,mchalupa/wayland,tulcod/wayland,sir-murray/wayland,eyolfson/wayland,eyolfson/wayland,sir-murray/wayland,abooij/wayland,bitfactor/wayland