1.1 --- a/lemon/concept/graph_components.h	Tue Jul 11 16:09:49 2006 +0000
     1.2 +++ b/lemon/concept/graph_components.h	Wed Jul 12 10:34:07 2006 +0000
     1.3 @@ -362,8 +362,8 @@
     1.4        
     1.5  	void constraints() {
     1.6  	  checkConcept< BaseGraphComponent, _Graph >();
     1.7 -	  typename _Graph::Node node;      
     1.8 -	  typename _Graph::Edge edge;
     1.9 +	  typename _Graph::Node node(INVALID);      
    1.10 +	  typename _Graph::Edge edge(INVALID);
    1.11  	  {
    1.12  	    graph.first(node);
    1.13  	    graph.next(node);
    1.14 @@ -442,8 +442,8 @@
    1.15  	void constraints() {
    1.16  	  checkConcept<Base, _Graph >();
    1.17  	  checkConcept<BaseIterableGraphComponent<Base>, _Graph>();
    1.18 -	  typename _Graph::Node node;
    1.19 -	  typename _Graph::UEdge uedge;
    1.20 +	  typename _Graph::Node node(INVALID);
    1.21 +	  typename _Graph::UEdge uedge(INVALID);
    1.22            bool dir;
    1.23  	  {
    1.24  	    graph.first(uedge);