Fix unit tests from RegionSettings commit

OpenSim/Data/Null/NullSimulationData.cs

@@ -59,19 +59,23 @@ namespace OpenSim.Data.Null
         public void StoreRegionSettings(RegionSettings rs)
         {
         }
+
         public RegionLightShareData LoadRegionWindlightSettings(UUID regionUUID)
         {
             //This connector doesn't support the windlight module yet
             //Return default LL windlight settings
             return new RegionLightShareData();
         }
+
         public void RemoveRegionWindlightSettings(UUID regionID)
         {
         }
+
         public void StoreRegionWindlightSettings(RegionLightShareData wl)
         {
             //This connector doesn't support the windlight module yet
         }
+
         public RegionSettings LoadRegionSettings(UUID regionUUID)
         {
             return null;

OpenSim/Tests/Common/Mock/MockRegionDataPlugin.cs

@@ -163,6 +163,10 @@ namespace OpenSim.Data.Null
         {
             RegionSettings rs = null;
             m_regionSettings.TryGetValue(regionUUID, out rs);
+
+            if (rs == null)
+                rs = new RegionSettings();
+            
             return rs;
         }