*Fix the bug that caster cannot have more than two persistent AA of the same spell.

--HG--
branch : trunk

src/game/SpellAuras.cpp

@@ -851,6 +851,7 @@ void AreaAuraEffect::Update(uint32 diff)
 
 void PersistentAreaAuraEffect::Update(uint32 diff)
 {
+    /*
     if(Unit *caster = GetParentAura()->GetCaster())
     {
         if(DynamicObject *dynObj = caster->GetDynObject(GetId(), GetEffIndex()))
@@ -862,6 +863,15 @@ void PersistentAreaAuraEffect::Update(uint32 diff)
             }
         }
     }
+    */
+    if(DynamicObject *dynObj = GetSource())
+    {
+        if(m_target->IsWithinDistInMap(dynObj, dynObj->GetRadius()))
+        {
+            AuraEffect::Update(diff);
+            return;
+        }
+    }
 
     // remove the aura if its caster or the dynamic object causing it was removed
     // or if the target moves too far from the dynamic object