$NetBSD: patch-ah,v 1.1 2008/09/05 02:07:51 dholland Exp $

Fix 64-bit build.

--- runtime/lexing.c~	1994-11-01 12:36:10.000000000 -0500
+++ runtime/lexing.c	2008-09-04 21:13:59.000000000 -0400
@@ -4,6 +4,8 @@
 #include "stacks.h"
 #include "str.h"
 
+value callback(value closure, value argument);
+
 struct lexer_buffer {
   value refill_buff;
   value lex_buffer;