Merge branch 'v0.20.x'

src/player/Thread.cxx

@@ -556,8 +556,10 @@ Player::SendSilence()
 	   partial frames */
 	unsigned num_frames = sizeof(chunk->data) / frame_size;
 
+	chunk->bit_rate = 0;
 	chunk->time = SignedSongTime::Negative(); /* undefined time stamp */
 	chunk->length = num_frames * frame_size;
+	chunk->replay_gain_serial = MusicChunk::IGNORE_REPLAY_GAIN;
 	PcmSilence({chunk->data, chunk->length}, play_audio_format.format);
 
 	try {