[Bug 66952] esddsp not support SNDCTL_DSP_CHANNELS ioctl.

[Tatsuya Noda]

Public bug reported:

I used esddsp for testing portaudio, but sound played twice the length
of original time.

so I checked source of portaudio and esddsp, they are working as:
 1. portaudio use SNDCTL_DSP_CHANNELS with 2(stereo)
 2. esddsp ignore this, but return successful return value
 3. finally, esddsp using default mode(monoral)

so, maybe real bug is 2nd behavior (ignore and successful return value),
but we seems like to support this ioctl, by OSS API reference <http://manuals.opensound.com/developer/SNDCTL_DSP_CHANNELS.html>.

** Affects: esound (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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esddsp not support SNDCTL_DSP_CHANNELS ioctl.
https://launchpad.net/bugs/66952