Ensure closure of bitmap and memory stream with using() statements in WorldViewModule.

If this has any effect then it will only be to the map images returned via requests to the /worldview simulator HTTP path (not enabled by default)

OpenSim/Region/OptionalModules/World/WorldView/WorldViewModule.cs

@@ -113,14 +113,15 @@ namespace OpenSim.Region.OptionalModules.World.WorldView
             if (!m_Enabled)
                 return new Byte[0];
 
-            Bitmap bmp = m_Generator.CreateViewImage(pos, rot, fov, width,
-                    height, usetex);
-
-            MemoryStream str = new MemoryStream();
-
+            using (Bitmap bmp = m_Generator.CreateViewImage(pos, rot, fov, width, height, usetex))
+            {
+                using (MemoryStream str = new MemoryStream())
+                {
                     bmp.Save(str, ImageFormat.Jpeg);
 
                     return str.ToArray();
                 }
             }
         }
+    }
+}