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

Fix 64-bit build.

--- yacc/defs.h~	1995-05-02 10:47:38.000000000 -0400
+++ yacc/defs.h	2008-09-04 21:21:25.000000000 -0400
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #ifdef __STDC__
 #include <stdlib.h>
+#include <string.h>
 #endif
 
 #ifdef macintosh