Hans Gruber is Santa Claus. This should be obvious even to those disadvantaged souls who didn't grow up with Die Hard on TV as the family yule log. Consider: Both have murky European origins, both promise punishment to those who do not obey their edicts, and both bring annual delight to the world by plunging out of the sky. They also share terrific beards, though Hans is more fastidious about trimming. Alan Rickman even spent the better part of the past decade playing another fearsome children's character, as if unable to let go.  Showing at: Bagdad, 11 pm Friday, Dec. 2. $3.