EMI: Fix the attached actor's position when attaching two actors.

Don't set the attached actor's position when attaching two actors. This actor is already moved relative to the object being attached to when getting the global position.

In the original engine, it appears that attaching does not change the value returned by getpos(), only getglobalpos(). Removing this line prevents the attached object from being moved twice. This fixes the candles in the Governor's Mansion Interior.