Looks a bit excessive given how simple the base is but hey, we don't want to
ever break that bit. That'd be embarrassing.
And while we're at it make sure that the 'wrong' event getters return NULL for
each event.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
