Fix regression in 5f4f9f0 (Fri Jun 8 2012) which stopped "show stats" and json stats from working

OpenSim/Region/Application/OpenSimBase.cs

@@ -223,6 +223,8 @@ namespace OpenSim
 
             base.StartupSpecific();
 
+            m_stats = StatsManager.SimExtraStats;
+
             // Create a ModuleLoader instance
             m_moduleLoader = new ModuleLoader(m_config.Source);