avformat/dump: use av_dict_iterate

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavformat/dump.c

@@ -140,7 +140,7 @@ static void dump_metadata(void *ctx, const AVDictionary *m, const char *indent)
         const AVDictionaryEntry *tag = NULL;
 
         av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
-        while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX)))
+        while ((tag = av_dict_iterate(m, tag)))
             if (strcmp("language", tag->key)) {
                 const char *p = tag->value;
                 av_log(ctx, AV_LOG_INFO,