If para_server is restarted and starts streaming using another audio format than
the one used before the restart, para_audiod might end up starting the decoder
associated with the old audio format.
Fix this by invalidating current_audio_format_num in close_stat_pipe() which is
called when the server goes away.
stat_task->length_seconds = 0;
stat_task->offset_seconds = 0;
stat_task->vss_status = 0;
+ stat_task->current_audio_format_num = -1;
audiod_status_dump();
}