replace "(char*)0" with "NULL"

diff --git a/lib/circogen/circular.c b/lib/circogen/circular.c
index 322c4b439f233c2e0fc654b38fe42b42cd7ebfe9..3191f0b1dab8deeba146912eaf638dc865a57785 100644 (file)
--- a/lib/circogen/circular.c
+++ b/lib/circogen/circular.c
@@ -45,15 +45,15 @@ static void initGraphAttrs(Agraph_t * g, circ_state * state)
 #ifndef WITH_CGRAPH
        G_mindist = agfindattr(rootg, "mindist");
 #else /* WITH_CGRAPH */
-       G_mindist = agattr(rootg,AGRAPH, "mindist",(char*)0);
+       G_mindist = agattr(rootg,AGRAPH, "mindist", NULL);
 #endif /* WITH_CGRAPH */
        min_dist = late_double(rootg, G_mindist, MINDIST, 0.0);
 #ifndef WITH_CGRAPH
        N_artpos = agfindattr(rootg->proto->n, "articulation_pos");
        N_root = agfindattr(rootg->proto->n, "root");
 #else /* WITH_CGRAPH */
-       N_artpos = agattr(rootg,AGNODE, "articulation_pos",(char*)0);
-       N_root = agattr(rootg,AGNODE, "root",(char*)0);
+       N_artpos = agattr(rootg,AGNODE, "articulation_pos", NULL);
+       N_root = agattr(rootg,AGNODE, "root", NULL);
 #endif /* WITH_CGRAPH */
        rootname = agget(rootg, "root");
     }