From 55a899f929769c078c0d212975d8dbdaf0d80a2e Mon Sep 17 00:00:00 2001
From: Roman Zeyde <roman.zeyde@gmail.com>
Date: Tue, 27 Feb 2018 10:32:41 +0200
Subject: [PATCH] trezor: initialize cached_passphrase_ack with None (instead
 of 0)

---
 libagent/device/trezor.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libagent/device/trezor.py b/libagent/device/trezor.py
index 5d7cccf..0dc3d5b 100644
--- a/libagent/device/trezor.py
+++ b/libagent/device/trezor.py
@@ -79,7 +79,7 @@ class Trezor(interface.Device):
 
         conn.callback_PinMatrixRequest = new_handler
 
-    cached_passphrase_ack = 0
+    cached_passphrase_ack = None
 
     def _override_passphrase_handler(self, conn):
         cli_handler = conn.callback_PassphraseRequest