allow unset weather provider

aman/com/Euroscope.py

@@ -28,15 +28,16 @@ class ComThread(Thread):
                 report.ParseFromString(msg)
 
                 # try to associate the received aircrafts to airports
-                icao = []
+                icao = None
                 for inbound in report.reports:
                     self.AMAN.updateAircraftReport(inbound)
                     icao = inbound.destination
 
                 # get the sequence of the airport
-                airport = self.AMAN.findAirport(icao)
-                if None != airport:
-                    self.Com.sendSequence('', airport.inboundSequence(), airport.WeatherModel)
+                if None != icao:
+                    airport = self.AMAN.findAirport(icao)
+                    if None != airport:
+                        self.Com.sendSequence(icao, airport.inboundSequence(), airport.WeatherModel)
 
             except zmq.ZMQError as error:
                 if zmq.EAGAIN == error.errno:

aman/com/Weather.py

@@ -21,7 +21,7 @@ class Weather(Thread):
 
         if 'DWD' == config.Provider.upper():
             self.Provider = DwdCrawler()
-        else:
+        elif 'NONE' != config.Provider.upper():
             sys.stderr.write('Invalid or unknown weather-provider defined')
             sys.exit(-1)