There is mistake in BLE simple central when disconnect is called

[cz8pru]

There is code in git:

micropython/examples/bluetooth/ble_simple_central.py

Lines 181 to 185 in 41ed01f

	def disconnect(self):
	if not self._conn_handle:
	return
	self._ble.gap_disconnect(self._conn_handle)
	self._reset()

I used that code and my device never disconnected, I found problem in "if" condition and change it to following code, which works for me:

def disconnect(self):
        if self._conn_handle is None:
            return
        self._ble.gap_disconnect(self._conn_handle)):
        self._reset()

[dpgeorge]

Thanks for the report. Fixed by e1f211c