$NetBSD: patch-ab,v 1.4 2022/11/27 13:14:00 triaxx Exp $

Compliance with toupper() documentation.

--- src/ntlm.c.orig	2021-07-01 16:59:57.000000000 +0000
+++ src/ntlm.c
@@ -42,7 +42,7 @@ int text2unicode(const char * text, char
 	buflen = ((buflen>>1)<<1);
 	if(!text || !buflen) return 0;
 	do {
-		buf[count++] = toupper(*text++);
+		buf[count++] = toupper((unsigned char)*text++);
 		buf[count++] = '\0';
 	} while (*text && count < buflen);
 	return count;