[FFmpeg-cvslog] avformat/srtdec: Fix memleak upon read header failure

[Andreas Rheinhardt]

ffmpeg | branch: release/3.4 | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun Jun 14 03:23:27 2020 +0200| [280f6bcddd956a3a4b37f5ef2b2ddb1a960f1f9a] | committer: Andreas Rheinhardt

avformat/srtdec: Fix memleak upon read header failure

The already parsed subtitles (contained in an FFDemuxSubtitlesQueue)
would leak if an error happened upon reading a subsequent subtitle.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
(cherry picked from commit c70409957c7332971f0e147729d769f6d2f95390)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=280f6bcddd956a3a4b37f5ef2b2ddb1a960f1f9a
---

 libavformat/srtdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/srtdec.c b/libavformat/srtdec.c
index 56bd0c43f6..67b245a123 100644
--- a/libavformat/srtdec.c
+++ b/libavformat/srtdec.c
@@ -207,6 +207,8 @@ static int srt_read_header(AVFormatContext *s)
     ff_subtitles_queue_finalize(s, &srt->q);
 
 end:
+    if (res < 0)
+        ff_subtitles_queue_clean(&srt->q);
     av_bprint_finalize(&buf, NULL);
     return res;
 }