firewire dvcam video device with audio input overrides the "Audio device name"

The problem lays in VLCs method to handle audio devices when a audio input is detected from the video device when using dshow.

How to reproduce:

1. Use a DVcam with mic and plug it into firewire port.
2. Open VLC and select "Open Capture Device" 2.2 => Press the "Refresh list" buttons
3. Select the DVcam in "Video device name" (should be something with the name "Microsoft DV/AV")
4. Select a mic (or other source) in "Audio device name"
5. Press Ok
6. Talk and see (or rather hear) that the "Audio device name" is ignored.

What is expected:

Only the audio from the "Audio device name" should be heard.

What else:

Should be possible also to select audio from the DV/AV cam.