BETA: Rare NPE fix.

L2J_DataPack_BETA/dist/game/data/scripts/handlers/effecthandlers/ImmobilePetBuff.java

@@ -58,7 +58,8 @@ public class ImmobilePetBuff extends L2Effect
 	@Override
 	public void onExit()
 	{
-		_pet.setIsImmobilized(false);
+		if (_pet != null)
+			_pet.setIsImmobilized(false);
 	}
 	
 	@Override