$OpenBSD: patch-gcc_tree-dump_c,v 1.2 2005/03/07 16:30:06 espie Exp $
--- gcc/tree-dump.c.orig	Tue Feb 15 16:53:47 2005
+++ gcc/tree-dump.c	Tue Feb 22 19:38:42 2005
@@ -824,7 +824,7 @@ 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