$OpenBSD: patch-src_Filter_cc,v 1.1 2002/12/29 00:10:48 pvalchev Exp $
--- src/Filter.cc.orig	Sat Dec 28 15:24:26 2002
+++ src/Filter.cc	Sat Dec 28 15:25:12 2002
@@ -178,7 +178,7 @@ int OutputFilter::getfd()
       }
       if(a)
 	 execvp(a->a0(),a->GetV());
-      execl("/bin/sh","sh","-c",name,NULL);
+      execl("/bin/sh","sh","-c",name,(void *)NULL);
       fprintf(stderr,_("execl(/bin/sh) failed: %s\n"),strerror(errno));
       fflush(stderr);
       _exit(1);
