From fc47e9443b61342f111078e8da8f0e6b281240aa Mon Sep 17 00:00:00 2001
From: Paulus Schoutsen <paulus@paulusschoutsen.nl>
Date: Tue, 10 Oct 2017 01:39:25 -0700
Subject: [PATCH] OwnTracks: Fix handler is None checking (#9794)

* OwnTracks: Fix handler is None checking

* Update owntracks.py
---
 homeassistant/components/device_tracker/owntracks.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/homeassistant/components/device_tracker/owntracks.py b/homeassistant/components/device_tracker/owntracks.py
index 07dc9f1ab5c..f301b2f454e 100644
--- a/homeassistant/components/device_tracker/owntracks.py
+++ b/homeassistant/components/device_tracker/owntracks.py
@@ -407,7 +407,8 @@ def async_handle_message(hass, context, message):
     handler = HANDLERS.get(msgtype)
 
     if handler is None:
-        error = 'Received unsupported message type: {}.'.format(msgtype)
-        _LOGGER.warning(error)
+        _LOGGER.warning(
+            'Received unsupported message type: %s.', msgtype)
+        return
 
     yield from handler(hass, context, message)