From 2b54c86e7e043ebae6f056943bdffd039bfd0ba7 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Sun, 3 Jun 2018 07:11:10 +0100
Subject: [PATCH] Stop calling ssh2_set_window in SSH-1!

This must have been a bug introduced during the SSH-2 connection
sharing rework. Apparently nobody's ever re-tested SSH-1 X forwarding
since then - until I did so yesterday in the course of testing my
enormous refactor of the packet unmarshalling code.
---
 ssh.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ssh.c b/ssh.c
index 77d3f582..24c17630 100644
--- a/ssh.c
+++ b/ssh.c
@@ -9456,7 +9456,9 @@ void sshfwd_x11_is_local(struct ssh_channel *c)
      * exchange mode.
      */
     c->u.x11.initial = FALSE;
-    ssh2_set_window(c, ssh_is_simple(c->ssh) ? OUR_V2_BIGWIN : OUR_V2_WINSIZE);
+    if (c->ssh->version == 2)
+        ssh2_set_window(
+            c, ssh_is_simple(c->ssh) ? OUR_V2_BIGWIN : OUR_V2_WINSIZE);
 }
 
 /*