I think the .gif clearly shows Ginobili's left hand coming down on Lebron's left forearm before going up for the reverse layup.
From the other angle, Manu missed. They showed the replay on TV ... regardless, there was quite a bit of contact from Miami on the Spurs that wasn't called. Hell, Allen jumped into Green and caused him to fall - no call. Allen shoots the ball, kicks out and gets the foul on Green. At least in the post they're being consistent.