$NetBSD: patch-aa,v 1.1 2008/11/17 13:30:34 ahoka Exp $

--- Doc/ttman.c.orig	2007-07-27 16:52:13.000000000 +0200
+++ Doc/ttman.c
@@ -175,7 +175,7 @@ static int emit_keyword(const char *buf,
 	int i, len;
 
 	for (len = 0; len < size; len++) {
-		if (!isalnum(buf[len]))
+		if (!isalnum((unsigned char)buf[len]))
 			break;
 	}
 
