[SP] Prevent a crash in NPC_ChoosePainAnimation when NPCs are knocked down.
[MP] Prevent a crash in NPC_ChoosePainAnimation when NPCs are knocked down.
[SP] Remove leftover demo game code.  Remove __NO_JKA code from JK2.
[MP] Remove some unused chunk stuff in cg_effects.c
[SP] Replace some header guards with pragma once.