Clarify root node transformation discard

components/nif/node.hpp

@@ -225,9 +225,10 @@ struct NiNode : Node
         // Discard transformations for the root node, otherwise some meshes
         // occasionally get wrong orientation. Only for NiNode-s for now, but
         // can be expanded if needed.
+        // FIXME: if node 0 is *not* the only root node, this must not happen.
         if (0 == recIndex && !Misc::StringUtils::ciEqual(name, "bip01"))
         {
-            static_cast<Nif::Node*>(this)->trafo = Nif::Transformation::getIdentity();
+            trafo = Nif::Transformation::getIdentity();
         }
     }