TS: prioritize normal audio tracks over special ones

Otherwise, VLC sometimes selects the impaired track instead of the
usual/default one. This is a major annoyance with YLE, the Finnish
national broadcaster. YLE routinely provides a visual impaired audio
track in Finnish (declared as Dutch for some reason!) in addition to
the original version.

modules/demux/ts.c

@@ -3842,6 +3842,7 @@ static void PMTParseEsIso639( demux_t *p_demux, ts_pid_t *pid,
     switch( p_decoded->code[0].i_audio_type )
     {
     case 0:
+        pid->es->fmt.i_priority = 1; // prioritize normal audio tracks
         pid->es->fmt.psz_description = NULL;
         break;
     case 1: