Bugfix: Networked game was rollbacking to a wrong frame #18
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Handle network frame can run multiple times per frame so the tickToRollbackTo could be overwritten by a bad value.
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Since handleNetworkUpdate can be executed multiple times per frame, it was rewriting the value of tickToRollbackTo with incorrect values. Also, the computation of howMuchToUnrollTo in Rollback Manager was botched (covered by unit tests now).