Add missing typename

dune/fufem/refinedfehelper.hh

@@ -26,7 +26,7 @@ struct IsRefinedLocalFiniteElement<typename Dune::template LocalFiniteElementVir
 
     static bool value(const LocalFiniteElementType& fe)
     {
-        using Traits = LocalFiniteElementType::Traits::LocalBasisType::Traits;
+        using Traits = typename LocalFiniteElementType::Traits::LocalBasisType::Traits;
         using DT = typename Traits::DomainFieldType;
         using RT = typename Traits::RangeFieldType;
         static constexpr int dim = Traits::dimDomain;