Check for 'unavailable' while updating temperature sensor in Climate …

…device (#416)

* add state_unavailable to sensor update.

* fix style

* fix style

custom_components/tahoma/climate_devices/somfy_thermostat.py

@@ -17,6 +17,7 @@
 from homeassistant.const import (
     ATTR_TEMPERATURE,
     EVENT_HOMEASSISTANT_START,
+    STATE_UNAVAILABLE,
     STATE_UNKNOWN,
     TEMP_CELSIUS,
 )
@@ -141,7 +142,7 @@ async def _async_temp_sensor_changed(self, entity_id, old_state, new_state) -> N
     @callback
     def update_temp(self, state):
         """Update thermostat with latest state from sensor."""
-        if state is None or state.state == STATE_UNKNOWN:
+        if state is None or state.state in [STATE_UNKNOWN, STATE_UNAVAILABLE]:
             return
 
         try: