$OpenBSD: patch-src_flow-capture_c,v 1.4 2006/12/08 08:23:42 jakob Exp $
--- src/flow-capture.c.orig	Mon Jan  5 18:56:50 2004
+++ src/flow-capture.c	Wed Nov 22 10:57:02 2006
@@ -1235,7 +1235,7 @@ skip_pdu_decode:
           } else if (!n) { /* child */
 
             n = execl(post_rotate_exec, post_rotate_exec, cap_file.nname,
-                NULL);
+                (void *)NULL);
 
             if (n == -1) 
               fterr_err(1, "exec(%s)", post_rotate_exec);