$OpenBSD: patch-gcc_tree-dump_c,v 1.1.1.1 2007/03/17 22:35:26 espie Exp $
--- gcc/tree-dump.c.orig	Mon Feb 19 05:12:49 2007
+++ gcc/tree-dump.c	Mon Mar 12 11:37:54 2007
@@ -885,7 +885,7 @@ get_dump_file_name (enum tree_dump_index
 	dump_id[0] = '\0';
     }
 
-  return concat (dump_base_name, dump_id, dfi->suffix, NULL);
+  return concat (dump_base_name, dump_id, dfi->suffix, (void *)0);
 }
 
 /* Begin a tree dump for PHASE. Stores any user supplied flag in
