1.1 --- a/lemon/concepts/heap.h	Wed Jan 11 14:01:21 2012 +0100
     1.2 +++ b/lemon/concepts/heap.h	Fri Jan 20 19:20:02 2012 +0100
     1.3 @@ -314,6 +314,7 @@
     1.4  
     1.5          _Heap& heap;
     1.6          ItemIntMap& map;
     1.7 +        Constraints() {}
     1.8        };
     1.9      };
    1.10