- Add support for MCIWNDF_NOAUTOSIZEMOVIE, MCIWNDF_NOAUTOSIZEWINDOW
  and MCIWNDF_NOERRORDLG flags in the MCIWndClass implementation.
- Implement support for MCI_UPDATE in the MCIAVI driver and use it in
  the MCIWndClass WM_PAINT handler.
- Reimplement MCI_STOP command in the MCIAVI driver via an event.
- Add a test preventing the MCIAVI driver to crash after MCI_SEEK
  behind an end of stream.