[FFmpeg-cvslog] avformat/matroskaenc: Fix use of uninitialized value

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sun Jun 26 06:12:32 2022 +0200| [2cce1d852862c91a14a9921bf15a7e0e027c7164] | committer: Andreas Rheinhardt

avformat/matroskaenc: Fix use of uninitialized value

Regression since 67eea6cf026a70940ea402d54685d67c660b49cd.
Affects only WebVTT when muxing WebM. (This is covered
by the webm-webvtt-remux FATE test which fails for several
FATE boxes on fate-ffmpeg.org.)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2cce1d852862c91a14a9921bf15a7e0e027c7164
---

 libavformat/matroskaenc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 4f5afc1be4..1256bdfe36 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -1914,6 +1914,7 @@ static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
     }
 
     end_ebml_master(pb, track_master);
+    ret = 0;
 fail:
     ffio_reset_dyn_buf(mkv->tmp_bc);