$OpenBSD: patch-filter_c,v 1.2 2007/06/15 19:01:07 kili Exp $
--- filter.c.orig	Wed May 23 03:17:53 2007
+++ filter.c	Mon May 28 19:10:48 2007
@@ -113,7 +113,7 @@ mutt_create_filter_fd (const char *cmd, FILE **in, FIL
       close (fderr);
     }
 
-    execl (EXECSHELL, "sh", "-c", cmd, NULL);
+    execl (EXECSHELL, "sh", "-c", cmd, (void *)NULL);
     _exit (127);
   }
   else if (thepid == -1)
