New feature: delayed grenade explosions:

- use transformation menu to change explosion mode
- only Normal/Stun/Flashbang type grenades can be delayed
- AI soldiers will avoid staying close to armed grenades\explosives
- use option DELAYED_GRENADE_EXPLOSION to make all hand\GL grenades work as delayed
- new value AP_GRENADE_MODE = 4 in APBPConstants.ini
- new item flag DELAYED_GRENADE_EXPLOSION

Other changes:
- fixed call to sqrt in DrawExplosionWarning() that prevented compiling in VS2010
- correctly update interface after transformations
- PATHAI: AI soldiers will skip gassed tiles if not in gas already
- InGas check: AI soldiers will avoid mustard gas even when wearing gas mask
- Yellow AI: added check to avoid gas/water/bomb using FindNearestUngassedLand
- gas/flare grenades will always explode instantly even when in bad state
- LegalNPCDestination: locations near armed bombs are not legal
- FindBestNearbyCover: avoid locations near armed bombs

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@8324 3b4a5df2-a311-0410-b5c6-a8a6f20db521

Tactical/PATHAI.cpp

@@ -60,6 +60,9 @@ class SOLDIERTYPE;
 
 extern UINT16 gubAnimSurfaceIndex[ TOTALBODYTYPES ][ NUMANIMATIONSTATES ];
 
+// sevenfm:
+extern BOOLEAN InGas( SOLDIERTYPE *pSoldier, INT32 sGridNo );
+
 //extern UINT8 gubDiagCost[20];
 // skiplist has extra level of pointers every 4 elements, so a level 5is optimized for
 // 4 to the power of 5 elements, or 2 to the power of 10, 1024
@@ -3128,6 +3131,14 @@ if(!GridNoOnVisibleWorldTile(iDestination))
 				goto NEXTDIR;
 			}
 
+			// sevenfm: skip gas if not in gas already
+			if( !(s->flags.uiStatusFlags & SOLDIER_PC) &&
+				InGas(s, newLoc) &&
+				!InGas(s, s->sGridNo) )
+			{
+				goto NEXTDIR;
+			}
+
 			// WANNE: Know mines (for enemy or player) do not explode - BEGIN
 			if ( gpWorldLevelData[newLoc].uiFlags & (MAPELEMENT_ENEMY_MINE_PRESENT | MAPELEMENT_PLAYER_MINE_PRESENT) )
 			{