siff: convert to new channel layout API

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

libavformat/siff.c

@@ -80,8 +80,7 @@ static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
         return AVERROR(ENOMEM);
     ast->codecpar->codec_type            = AVMEDIA_TYPE_AUDIO;
     ast->codecpar->codec_id              = AV_CODEC_ID_PCM_U8;
-    ast->codecpar->channels              = 1;
-    ast->codecpar->channel_layout        = AV_CH_LAYOUT_MONO;
+    ast->codecpar->ch_layout             = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
     ast->codecpar->bits_per_coded_sample = 8;
     ast->codecpar->sample_rate           = c->rate;
     avpriv_set_pts_info(ast, 16, 1, c->rate);