Removes a links between two MOD music or stream channels.
|handle||The channel handle... a HMUSIC or HSTREAM.
|chan||The handle of the channel to have unlinked with it... a HMUSIC or HSTREAM.
If successful, then TRUE is returned, else FALSE is returned. Use BASS_ErrorGetCode to get the error code.
|BASS_ERROR_HANDLE||handle is not a valid channel.
|BASS_ERROR_ALREADY||Either chan is not a valid channel, or it is already not linked to handle.