Index: agent.h
===================================================================
RCS file: /nfs/jade/vint/CVSROOT/nam-1/agent.h,v
retrieving revision 1.20
diff -u -r1.20 agent.h
--- agent.h	16 Jun 2001 01:53:10 -0000	1.20
+++ agent.h	7 Feb 2005 20:25:16 -0000
@@ -70,7 +70,7 @@
   inline double width()  {return width_;}
   inline double height() {return height_;}
   virtual void findClosestCornertoPoint(double x, double y, 
-               double &corner_x, double &corner_y) const = NULL; 
+               double &corner_x, double &corner_y) const = 0; 
   virtual void place(double x, double y);
   void label(const char* name, int anchor);
   void color(const char* name);