Setpanning always both Channels on Linux

[fingus]

Setpanning doesn't work on Linux and always produces stereo output. This issue was tested on multiple Linux distributions including Linux Mint, Manjaro, and Ubuntu. Both the 'Setpanning' standalone command and the table tag of 'PlaySample' or 'PlayMusic' were tested, yielding the same result.

However, when running a compiled Windows applet under Linux using Wine, Setpanning works unexpectedly.

[airsoftsoftwair]

Yes, apparently this is currently unsupported on Linux but it's on my list.