fftools/ffplay: remove usage of internal AVInputFormat.read_seek field

It's an internal field, so it should not be touched.
Reviewed-by: Marton Balint <cus@passwd.hu>
Signed-off-by: James Almer <jamrial@gmail.com>

fftools/ffplay.c

@@ -2639,7 +2639,7 @@ static int stream_component_open(VideoState *is, int stream_index)
 
         if ((ret = decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread)) < 0)
             goto fail;
-        if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
+        if (is->ic->iformat->flags & AVFMT_NOTIMESTAMPS) {
             is->auddec.start_pts = is->audio_st->start_time;
             is->auddec.start_pts_tb = is->audio_st->time_base;
         }