In python the way to designate an empty block is with
the "pass" statement. This patch updates
cel/scripts/smallgame/actor.py to use that instead of a
hack that has the same effect.
This patch has not been tested as I am having an
unrelated problem with the install target. Someone
with a working install of CEL can test it or if I later
get CEL installed I will post a confirmation that it
works. Regardless I have a very high level of
confidence that it works.