fix yaml exclusion

custom_components/mega/hub.py

@@ -61,6 +61,7 @@ class MegaD:
         """Initialize."""
         if mqtt_inputs is None or mqtt_inputs == 'None' or mqtt_inputs is False:
             self.http = hass.data.get(DOMAIN, {}).get(CONF_HTTP)
+            if not self.http is None:
                 self.http.allowed_hosts |= {host}
         else:
             self.http = None