[waiting for ZDoom fix]Hitscan miss targets directly above

[Janizdreg]

Attacking targets directly above or below the player with hitscan weapons doesn't work properly. Bullet weapons totally miss the target, melee weapons sometimes hit but often don't do any damage. Here's a couple of save files for 8 Bits CTF if you want to try this out by yourself.

[Graf Zahl]

Randy has fixed this in his floating point code and neither he nor I see any urgent reason to backport it to fixed point math.