sol: convert to new channel layout API

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

libavformat/sol.c

@@ -113,9 +113,7 @@ static int sol_read_header(AVFormatContext *s)
     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
     st->codecpar->codec_tag = id;
     st->codecpar->codec_id = codec;
-    st->codecpar->channels = channels;
-    st->codecpar->channel_layout = channels == 1 ? AV_CH_LAYOUT_MONO :
-                                                   AV_CH_LAYOUT_STEREO;
+    av_channel_layout_default(&st->codecpar->ch_layout,channels);
     st->codecpar->sample_rate = rate;
     avpriv_set_pts_info(st, 64, 1, rate);
     return 0;