He had like a toe over the line....there is no way in hell any referee with a shred of common sense would call that a violation.
And not just because a call like that shouldn't decide the game, but because players do inbounding stuff like that ALL. GAME. LONG. A player practically needs to walk the ball to half court to get a violation called on a routine in-bounds play.
We know that there are 10 by-the-book foul calls not made every trip down the floor in an NBA game. That's fine. Players and coaches ask only for consistency in the calls made/not made. To call THAT on Fox would have been the epitome of inconsistency.
In related news, in real time I thought: dag, if I were a coach w/Cleveland I'd put a huge, jumping body in front of Fox. It was gonna take an improbable play, obviously, but it becomes even less probable if the inbounder has a hard time throwing it where he wants to.