Panic in stream.rs:145:9 (unwrap `Err`) on Stream drop when device disconnected

[Aidiakapi]

Relevant backtrace:

  14: cpal::host::wasapi::stream::Stream::push_command
             at ...\.cargo\git\checkouts\cpal-c2179e82da06da7e\5fa5ce5\src\host\wasapi\stream.rs:145
  15: cpal::host::wasapi::stream::{{impl}}::drop
             at ...\.cargo\git\checkouts\cpal-c2179e82da06da7e\5fa5ce5\src\host\wasapi\stream.rs:156

On Windows, presumably using WASAPI, since I don't have ASIO installed.
To reproduce:

1. Create stream.
2. Disconnect the audio device, and properly get a DeviceNotAvailable error callback (created with device.build_output_stream(...)).
3. Drop stream.

On master branch, commit: 5fa5ce5