*Call Reset() only if the npc is alive.

*I hope this fix some issues in instances. Eg.: GetData() give the correct value.
*Thanks to megamage for the help.

--HG--
branch : trunk

src/game/UnitAI.h

@@ -23,6 +23,7 @@
 
 #include "Platform/Define.h"
 #include <list>
+#include "Unit.h"
 
 class Unit;
 class Player;
@@ -47,7 +48,7 @@ class TRINITY_DLL_SPEC UnitAI
         virtual void AttackStart(Unit *);
         virtual void UpdateAI(const uint32 diff) = 0;
 
-        virtual void InitializeAI() { Reset(); }
+        virtual void InitializeAI() { if(!me->isDead()) Reset(); }
 
         virtual void Reset() {};