connection-test: assert closure is not NULL before invoking it
connection-test: assert closure is not NULL before invoking it

Signed-off-by: U. Artie Eoff <32aece0d55055227b44d04b7d0051cf3d04ee871@intel.com>

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