Cast enum to int

amdis/linearalgebra/mtl/SlotSize.hpp

@@ -58,7 +58,7 @@ namespace AMDiS
     {
       using GridView = typename RowBasis::GridView;
       static std::size_t surrounding
-        = Math::pow<GridView::dimension>(2) * Dune::factorial(GridView::dimension);
+        = Math::pow<GridView::dimension>(2) * Dune::factorial(int(GridView::dimension));
 
       estRowSize_ = std::min(cols_, colBasis.localView().maxSize() * surrounding);
     }