* Add Nini.Config and System.Xml references to MockScene for Windows compilers

OpenSim/Region/ClientStack/LindenUDP/Tests/MockScene.cs

@@ -25,6 +25,8 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+using System.Xml;
+using Nini.Config;
 using OpenMetaverse;
 using OpenSim.Framework;
 using OpenSim.Region.Environment.Scenes;