Addresses Mantis #1611

Set thread culture for event processing threads in DotNetEngine.
XEngine already had this. Maybe someone with a French OS can verify
the fix.

OpenSim/Region/ScriptEngine/Common/ScriptEngineBase/EventQueueThreadClass.cs

@@ -153,6 +153,9 @@ namespace OpenSim.Region.ScriptEngine.Common.ScriptEngineBase
         /// </summary>
         private void EventQueueThreadLoop()
         {
+			CultureInfo USCulture = new CultureInfo("en-US");
+			Thread.CurrentThread.CurrentCulture = USCulture;
+
             //myScriptEngine.Log.Info("[" + ScriptEngineName + "]: EventQueueManager Worker thread spawned");
             try
             {