1.1 --- a/lemon/preflow.h	Wed Nov 28 17:51:02 2007 +0000
     1.2 +++ b/lemon/preflow.h	Wed Nov 28 18:01:38 2007 +0000
     1.3 @@ -168,6 +168,7 @@
     1.4  
     1.5      bool _phase;
     1.6  
     1.7 +
     1.8      void createStructures() {
     1.9        _node_num = countNodes(_graph);
    1.10  
    1.11 @@ -266,6 +267,13 @@
    1.12  
    1.13      /// @}
    1.14  
    1.15 +  protected:
    1.16 +    
    1.17 +    Preflow() {}
    1.18 +
    1.19 +  public:
    1.20 +
    1.21 +
    1.22      /// \brief The constructor of the class.
    1.23      ///
    1.24      /// The constructor of the class.