avcodec/utils: Print the codec name that is missing on the whitelist

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/utils.c

@@ -1386,7 +1386,7 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *code
         goto free_and_end;
 
     if (avctx->codec_whitelist && av_match_list(codec->name, avctx->codec_whitelist, ',') <= 0) {
-        av_log(avctx, AV_LOG_ERROR, "Codec not on whitelist\n");
+        av_log(avctx, AV_LOG_ERROR, "Codec (%s) not on whitelist\n", codec->name);
         ret = AVERROR(EINVAL);
         goto free_and_end;
     }