change PhysicActor::enableCollisions
PhysicActor::enableCollisions is really hacky. It works for now, but it won't work if it's not used in the proper situation. It should be changed, maybe using collisions callback.
(RM-689 from redmine: created on 2013-03-31 by gus gus, , closed on 2013-07-30 by scrawl .)