diff -r dc773bf49664 -r 606ec67fb063 tools/ioemu/vnc.c
--- a/tools/ioemu/vnc.c	Wed Aug 30 10:05:00 2006
+++ b/tools/ioemu/vnc.c	Wed Aug 30 16:23:38 2006
@@ -1269,7 +1269,7 @@
 	exit(1);
 
     case 0:	/* child */
-	execlp("vncviewer", "vncviewer", s, 0);
+	execlp("vncviewer", "vncviewer", s, (char *)NULL);
 	fprintf(stderr, "vncviewer execlp failed\n");
 	exit(1);