Windows: Device discovery with ClassicMethod doesn't finish when there is no classic device to be found

Calling

QBluetoothDeviceDiscoveryAgent::start(QBluetoothDeviceDiscoveryAgent::ClassicMethod)

on Windows doesn't finish when there is no classic device which can be found. Calling

QBluetoothDeviceDiscoveryAgent::start()

instead works fine, even when there is also no device which can be discovered.

Can be reproduced with the BTScanner example, when changing the first line in method DeviceDiscoveryDialog::startScan() appropriate.