thp: convert to new channel layout API

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

libavformat/thp.c

@@ -142,7 +142,7 @@ static int thp_read_header(AVFormatContext *s)
             st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
             st->codecpar->codec_id = AV_CODEC_ID_ADPCM_THP;
             st->codecpar->codec_tag = 0;  /* no fourcc */
-            st->codecpar->channels    = avio_rb32(pb); /* numChannels.  */
+            st->codecpar->ch_layout.nb_channels = avio_rb32(pb);
             st->codecpar->sample_rate = avio_rb32(pb); /* Frequency.  */
             st->duration           = avio_rb32(pb);