1.1 --- a/lemon/concepts/heap.h	Fri Jan 06 16:27:06 2012 +0100
     1.2 +++ b/lemon/concepts/heap.h	Thu Jan 19 15:25:06 2012 +0100
     1.3 @@ -252,6 +252,7 @@
     1.4  
     1.5          _Heap& heap;
     1.6          ItemIntMap& map;
     1.7 +        Constraints() {}
     1.8        };
     1.9      };
    1.10