maximal order of derivative function

amdis/gridfunctions/DiscreteLocalFunction.inc.hpp

@@ -216,7 +216,7 @@ public:
   {
     assert( bound_ );
     using AMDiS::order;
-    return Math::max(0, order(*subTree_)-1);
+    return std::max(0, int(order(*subTree_))-1);
   }
 
   /// Return the bound element