From c2da57e3a40347ed0d7d20fa9509b38919835b55 Mon Sep 17 00:00:00 2001
From: millert <millert@openbsd.org>
Date: Tue, 13 Apr 2021 15:39:21 +0000
Subject: [PATCH] Require that the argument to the window option be non-zero. A
 zero-row window would not be usable (no room to edit) and the code is full of
 assumptions that "sp->t_rows - 1" >= 0. From Erik Ruotsalainen, fixes a bug
 reported by Paul de Weerd.

---
 usr.bin/vi/common/options.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/usr.bin/vi/common/options.c b/usr.bin/vi/common/options.c
index d921afef311..ce80e7b2d70 100644
--- a/usr.bin/vi/common/options.c
+++ b/usr.bin/vi/common/options.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: options.c,v 1.28 2020/04/30 10:40:21 millert Exp $	*/
+/*	$OpenBSD: options.c,v 1.29 2021/04/13 15:39:21 millert Exp $	*/
 
 /*-
  * Copyright (c) 1991, 1993, 1994
@@ -182,7 +182,7 @@ OPTLIST const optlist[] = {
 /* O_WARN	    4BSD */
 	{"warn",	NULL,		OPT_1BOOL,	0},
 /* O_WINDOW	    4BSD */
-	{"window",	f_window,	OPT_NUM,	0},
+	{"window",	f_window,	OPT_NUM,	OPT_NOZERO},
 /* O_WINDOWNAME	    4BSD */
 	{"windowname",	NULL,		OPT_0BOOL,	0},
 /* O_WRAPLEN	  4.4BSD */
-- 
2.20.1