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/Item Types.h

@@ -820,6 +820,7 @@ extern OBJECTTYPE gTempObject;
 #define TAKEN_BY_MILITIA_TABOO_BLUE			0x0000000800000000	//		34359738368		// this item is taboo for blue militia (have to reset flag for world item upon dropping it)
 
 #define INFECTED							0x0000001000000000	//						// this item is infected with disease 0, getting damaged by this will infect you
+#define DELAYED_GRENADE_EXPLOSION			0x0000002000000000	//						// grenade will blow up on next turn
 
 // Flugente TODO 2012-09-17: next time we break savegame compatibility, extend the flagmasks from UINT32 to UINT64. I didn't do it this time (see double-used flag above), as we try to minimise those breaks. But it is needed.
 // ----------------------------------------------------------------