commenting out Nasal in scenery models for now. This could be responsible

for an MP/AI crash. Still investigating.

simgear/scene/model/model.cxx

@@ -339,8 +339,9 @@ sgLoad3DModel( const string &fg_root, const string &path,
   }
 
   if (data) {
-    data->modelLoaded(path, &props, model);
-    model->setUserData(data);
+    //data->modelLoaded(path, &props, model);
+    //model->setUserData(data);
+    delete data;
   }
                                 // Load animations
   set<ssgBranch *> ignore_branches;