-added StealthBonus tag to Items

-stealth works like extra camouflage, but is not terrain dependent and also conceals noise
-fixed armour attachments getting destroyed when armour is destroyed

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@361 3b4a5df2-a311-0410-b5c6-a8a6f20db521

Tactical/Item Types.h

@@ -383,6 +383,7 @@ typedef struct
 	INT16 percentburstfireapreduction;
 
 	INT16 camobonus;
+	INT16 stealthbonus;
 
 	UINT16 defaultattachment;
 } INVTYPE;