lavc/audiotoolboxdec: Forward extradata for QDMC and QDM2.

Fixes audiotoolbox decoding of QDMC and QDM2.

libavcodec/audiotoolboxdec.c

@@ -270,6 +270,8 @@ static av_cold int ffat_usable_extradata(AVCodecContext *avctx)
     ATDecodeContext *at = avctx->priv_data;
     return at->extradata_size &&
            (avctx->codec_id == AV_CODEC_ID_ALAC ||
+            avctx->codec_id == AV_CODEC_ID_QDM2 ||
+            avctx->codec_id == AV_CODEC_ID_QDMC ||
             avctx->codec_id == AV_CODEC_ID_AAC);
 }