What changed in EDuke32, build by build

Fix `define` token when parsing defs on the game side

Fix two erroneous uses of tileGetMapping in network.cpp

Fix semantics of G_CheckAdultTile w.r.t. tileGetMapping

Factor out display math common to Knee, Knuckles, Access, Tip

Simplify P_DisplayAccess a little bit

Minor cleanup to FLAMETHROWER_WEAPON draw code

Fix avel and horz input getters to use fix16_to_int