add some changes requested in PR related to C++98 compliance

src/algorithm/model.hpp

@@ -167,7 +167,7 @@ namespace pinocchio
       const std::vector<JointIndex> &list_of_joints_to_lock,
       const Eigen::MatrixBase<ConfigVectorType> &reference_configuration,
       ModelTpl<Scalar, Options, JointCollectionTpl> &reduced_model,
-      std::vector<std::reference_wrapper<GeometryModel>> &list_of_reduced_geom_models);
+      std::vector<GeometryModel> &list_of_reduced_geom_models);
 
 } // namespace pinocchio
 

src/algorithm/model.hxx

@@ -502,7 +502,8 @@ namespace pinocchio
     buildReducedModel(input_model, list_of_joints_to_lock, reference_configuration, reduced_model);
 
     // for all GeometryModels
-    for (const GeometryModel &input_geom_model : list_of_geom_models) {
+    for (size_t gmi = 0; gmi < list_of_geom_models.size(); ++gmi) {
+      const GeometryModel &input_geom_model = list_of_geom_models[gmi];
       GeometryModel reduced_geom_model;
 
       // Add all the geometries