avformat/aadec: Simplify cleanup after read_header failure

by setting the FF_FMT_INIT_CLEANUP flag.

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

libavformat/aadec.c

@@ -175,10 +175,8 @@ static int aa_read_header(AVFormatContext *s)
 
     /* decoder setup */
     st = avformat_new_stream(s, NULL);
-    if (!st) {
+    if (!st)
-        av_freep(&c->tea_ctx);
         return AVERROR(ENOMEM);
-    }
     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
     if (!strcmp(codec_name, "mp332")) {
         st->codecpar->codec_id = AV_CODEC_ID_MP3;
@@ -230,10 +228,8 @@ static int aa_read_header(AVFormatContext *s)
         avio_skip(pb, 4 + chapter_size);
         if (!avpriv_new_chapter(s, chapter_idx, st->time_base,
                                 chapter_pos * TIMEPREC,
-                                (chapter_pos + chapter_size) * TIMEPREC, NULL)) {
+                                (chapter_pos + chapter_size) * TIMEPREC, NULL))
-            av_freep(&c->tea_ctx);
             return AVERROR(ENOMEM);
-        }
     }
 
     st->duration = (largest_size - CHAPTER_HEADER_SIZE * s->nb_chapters) * TIMEPREC;
@@ -418,4 +414,5 @@ const AVInputFormat ff_aa_demuxer = {
     .read_seek      = aa_read_seek,
     .read_close     = aa_read_close,
     .flags          = AVFMT_NO_BYTE_SEEK | AVFMT_NOGENSEARCH,
+    .flags_internal = FF_FMT_INIT_CLEANUP,
 };