GridService - Region UUID can not be NULL

http://opensimulator.org/mantis/view.php?id=3426

OpenSim/Services/GridService/GridService.cs

@@ -107,6 +107,8 @@ namespace OpenSim.Services.GridService
         public string RegisterRegion(UUID scopeID, GridRegion regionInfos)
         {
             IConfig gridConfig = m_config.Configs["GridService"];
+            // First Check for invalidate NULL-UUID, if true fast quit 
+            if (regionInfos.RegionID == UUID.Zero) return "Invalidate RegionID - can not be UUID-NULL";            
             // This needs better sanity testing. What if regionInfo is registering in
             // overlapping coords?
             RegionData region = m_Database.Get(regionInfos.RegionLocX, regionInfos.RegionLocY, scopeID);