From b71b443c7c302b05342efef93c616c8b108ba7d2 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Sun, 17 Nov 2013 14:04:56 +0000
Subject: [PATCH] Add a missing null pointer check in s_write.

I don't know that this can ever be triggered in the current state of
the code, but when I start mucking around with SSH session closing in
the near future, it may be handy to have it.

[originally from svn r10076]
---
 ssh.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ssh.c b/ssh.c
index fa9bc745..e6b2d6be 100644
--- a/ssh.c
+++ b/ssh.c
@@ -1762,6 +1762,8 @@ static int s_write(Ssh ssh, void *data, int len)
     if (ssh->logctx)
 	log_packet(ssh->logctx, PKT_OUTGOING, -1, NULL, data, len,
 		   0, NULL, NULL);
+    if (!ssh->s)
+        return 0;
     return sk_write(ssh->s, (char *)data, len);
 }