Fix SPC (#17236)

homeassistant/components/binary_sensor/spc.py

@@ -26,6 +26,8 @@ def _get_device_class(zone_type):
 async def async_setup_platform(hass, config, async_add_entities,
                                discovery_info=None):
     """Set up the SPC binary sensor."""
+    if discovery_info is None:
+        return
     api = hass.data[DATA_API]
     async_add_entities([SpcBinarySensor(zone)
                         for zone in api.zones.values()