extra zeros at the end of arrays in world.bodies #139

There are extra zeros at the end of the parallel arrays which give information about bodies in the game world (in the match created by playback, these arrays are found in match.current.bodies). The extra zeros cause this bug: battlecode/battlecode20#357. I'm not sure if this is an issue with the engine or the playback part of the client. Also, since this issue arises when using the engine from last year, I'm not sure if it's still relevant.