Mix_SetPanning appears to only work when audio device is set for 2 channels

[superhac]

When using the Mix_SetPanning with more then two channels, say 8 (7.1) calling it has no effect on the audio. If I switch the same device back to two channel mode then the panning effect works as expected. The audio I'm playing is 2 channel also. Meaning there's only audio on the FR and FL channels.

I noticed in the wiki it mentions: Note that an audio device in mono mode is a no-op, but this call will return successful in that case. But I didn't see any other use cases listed as an exception to this not working. E.g. channel counts greater then 2.

Thanks!