$OpenBSD: patch-gcc_objc_objc-act_c,v 1.4 2005/08/04 14:51:37 espie Exp $
--- gcc/objc/objc-act.c.orig	Wed Jul 20 03:19:49 2005
+++ gcc/objc/objc-act.c	Thu Aug  4 10:54:01 2005
@@ -495,7 +495,7 @@ objc_init (void)
   /* If gen_declaration desired, open the output file.  */
   if (flag_gen_declaration)
     {
-      register char * const dumpname = concat (dump_base_name, ".decl", NULL);
+      register char * const dumpname = concat (dump_base_name, ".decl", (void *)0);
       gen_declaration_file = fopen (dumpname, "w");
       if (gen_declaration_file == 0)
 	fatal_error ("can't open %s: %m", dumpname);