Main Red AI: fixed decision weight calculation.
Player mercs should avoid moving into gas/fire when in autobandage mode or under AI control.
IsLocationSittable, IsLocationSittableExcludingPeople: return FALSE if location on roof does not exist.
NWSS: play room effect for first shot only.
AI inventory choosing: more variety for mortar shells, improved hand/GL grenade choosing code.
Red AI: improved mortar use code: use next action to fire mortar after stepping back.
git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@8920 3b4a5df2-a311-0410-b5c6-a8a6f20db521