When sending an LLUDP MoneyBalanceReply message, fill out the transaction item description even though there is none.

This is to deal with a problem in libomv where calling ToBytes() without this crashes because of an ItemDescription.Lnegth dereference.

OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs

@@ -1469,6 +1469,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             money.MoneyData.TransactionSuccess = success;
             money.MoneyData.Description = description;
             money.MoneyData.MoneyBalance = balance;
+            money.TransactionInfo.ItemDescription = Util.StringToBytes256("NONE");
             OutPacket(money, ThrottleOutPacketType.Task);
         }