message: vector initialization improvement
diff: @@ -191,13 +191,9 @@ class Simplex_tree_interface : public Simplex_tree<SimplexTreeOptions> {
  void expansion_with_blockers_callback(int dimension, blocker_func_t user_func, void *user_data) {
  Base::expansion_with_blockers(dimension, [&](Simplex_handle sh){
  - Simplex simplex;
  - for (auto vertex : Base::simplex_vertex_range(sh)) {
  - simplex.insert(simplex.begin(), vertex);
  - }
  + Simplex simplex(Base::simplex_vertex_range(sh).begin(), Base::simplex_vertex_range(sh).end());
  return user_func(simplex, user_data);
  });
  - Base::clear_filtration();
  }
  // Iterator over the simplex tree
  