avcodec/h264_metadata_bsf: fix the AVClass version number

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: jkqxz
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/h264_metadata_bsf.c

@@ -506,7 +506,7 @@ static const AVClass h264_metadata_class = {
     .class_name = "h264_metadata_bsf",
     .item_name  = av_default_item_name,
     .option     = h264_metadata_options,
-    .version    = LIBAVCODEC_VERSION_MAJOR,
+    .version    = LIBAVUTIL_VERSION_INT,
 };
 
 static const enum AVCodecID h264_metadata_codec_ids[] = {