Fix compilation issue

src/mesh/MeshSmoother.cpp

@@ -282,8 +282,8 @@ class MeshSmootherHandler::MeshSmoother
     is_displaced.fill(false);
 
     for (size_t i_zone = 0; i_zone < discrete_function_variant_list.size(); ++i_zone) {
-      auto is_zone_cell =
-        discrete_function_variant_list[i_zone]->get<const DiscreteFunctionP0<Dimension, const double>>();
+      auto is_zone_cell = discrete_function_variant_list[i_zone]->get<DiscreteFunctionP0<Dimension, const double>>();
+
       parallel_for(
         m_given_mesh.numberOfNodes(), PUGS_LAMBDA(const NodeId node_id) {
           auto node_cell_list = node_to_cell_matrix[node_id];