Enemy soldiers will try to avoid being hit by artillery strike.

FindBestNearbyCover:
- penalty to locations in red smoke danger zone
- avoid moving into red smoke danger zone if not in red smoke danger already
FindNearestUngassedLand: 
- improved code
- try not to move closer to known enemies.
- calculate path with correct movement mode
FindNearbyDarkerSpot: 
- improved code
- calculate path with correct movement mode
FindFlankingSpot:
- avoid locations near bombs
- avoid moving into red smoke danger zone

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@8753 3b4a5df2-a311-0410-b5c6-a8a6f20db521

TacticalAI/AIInternals.h

@@ -48,13 +48,6 @@ enum
 	NUM_URGENCY_STATES
 };
 
-#define NOWATER		 0
-#define WATEROK		 1
-
-#define IGNORE_PATH			 0
-#define ENSURE_PATH			 1
-#define ENSURE_PATH_COST		2
-
 #define DONTFORCE		0
 #define FORCE			1
 
@@ -95,7 +88,6 @@ enum
 #define MAX_THREAT_RANGE		400	// 30 tiles worth
 #define MIN_PERCENT_BETTER	5	// 5% improvement in cover is good
 
-
 #define TOSSES_PER_10TURNS		18		// max # of grenades tossable in 10 turns
 #define SHELLS_PER_10TURNS		13		// max # of shells	firable	in 10 turns