* Added a sanity check for Mono before trying to enumerate over an empty SortedDictionary

* Changed the order of a log line from DotNetEngine so you can tell whether or not it is actually loading

OpenSim/Region/ClientStack/LindenUDP/UnackedPacketCollection.cs

@@ -111,6 +111,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         {
             lock (SyncRoot)
             {
+                if (packets.Count == 0)
+                    return null;
+
                 using (SortedDictionary<uint, OutgoingPacket>.ValueCollection.Enumerator e = packets.Values.GetEnumerator())
                     return e.Current;
             }