need another move for squeeze

src/xml.cxx

@@ -962,7 +962,7 @@ namespace xml {
         throw wrong_node_number(*node, is, tpl[i].name(),
                                 node->list(tpl[i].name()).size(),
                                 tpl[i].min(), tpl[i].max());
-    return node;
+    return std::move(node);
   }
   Tag Factory::tag(std::istream& is, const Node& position)
       throw(second_slash_in_tag, character_after_slash, tag_expected,