*Fix the bug that possessed creature cannot melee.

--HG--
branch : trunk

src/game/NullCreatureAI.cpp

@@ -27,6 +27,11 @@ void PassiveAI::UpdateAI(const uint32)
         EnterEvadeMode();
 }
 
+void PossessedAI::AttackStart(Unit *target)
+{
+    me->Attack(target, true);
+}
+
 void PossessedAI::UpdateAI(const uint32 diff)
 {
     if(me->getVictim())

src/game/NullCreatureAI.h

@@ -41,6 +41,7 @@ class TRINITY_DLL_DECL PossessedAI : public PassiveAI
     public:
         PossessedAI(Creature *c) : PassiveAI(c) {}
 
+        void AttackStart(Unit *target);
         void UpdateAI(const uint32);
         void EnterEvadeMode() {}