g722: convert to new channel layout API

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

libavformat/g722.c

@@ -35,7 +35,7 @@ static int g722_read_header(AVFormatContext *s)
     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
     st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_G722;
     st->codecpar->sample_rate = 16000;
-    st->codecpar->channels    = 1;
+    st->codecpar->ch_layout   = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
 
     st->codecpar->bits_per_coded_sample =
         av_get_bits_per_sample(st->codecpar->codec_id);