From a353679796891ef8e0443233bf44c145d1376611 Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Fri, 23 Feb 2018 13:13:39 +0100
Subject: [PATCH] Fix downloading from another DC using wrong auth the first
 time

---
 telethon/session.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/telethon/session.py b/telethon/session.py
index 16232b14..4658df2b 100644
--- a/telethon/session.py
+++ b/telethon/session.py
@@ -227,7 +227,7 @@ class Session:
         c = self._cursor()
         c.execute('select auth_key from sessions')
         tuple_ = c.fetchone()
-        if tuple_:
+        if tuple_ and tuple_[0]:
             self._auth_key = AuthKey(data=tuple_[0])
         else:
             self._auth_key = None