tuhi: fix cold plug of devices last seen in pairing mode

fix ca82af78de ("tuhi: handle cold-plugged devices").

The point of deciding whether a device was in the pairing mode was actually
ignored when building the list of available devices.

tuhi/base.py

@@ -241,7 +241,7 @@ class Tuhi(GObject.Object):
 
         d = self.devices[bluez_device.address]
 
-        if Tuhi._is_pairing_device(bluez_device):
+        if pairing_device:
             d.paired = False
             logger.debug('{}: call Pair() on device'.format(bluez_device.objpath))
         elif d.listening: