Reset syncthru to newest state

Author: nielstron

homeassistant/components/sensor/syncthru.py

@@ -230,4 +230,4 @@ def update(self):
                 ).get(self._number, {})
             self._state = self._attributes.get('status')
             if self._state == '':
-                self._state = 'Ready'
+                self._state = 'Ready'