[FFmpeg-cvslog] avformat/movenc: Fix undefined shift

[Andreas Rheinhardt]

ffmpeg | branch: release/4.2 | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Fri Sep 20 00:17:03 2019 +0200| [d58dab562b7229961e837b3e5205aa52fdc00a3e] | committer: Andreas Rheinhardt

avformat/movenc: Fix undefined shift

Fixes the movenc FATE-test.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
(cherry picked from commit 646799b42fd59ee79920e472795bf881b78bb5ce)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d58dab562b7229961e837b3e5205aa52fdc00a3e
---

 libavformat/movenc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 4d4d0cd024..d0bd1824e1 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -4475,7 +4475,8 @@ static int mov_write_sidx_tag(AVIOContext *pb,
 {
     int64_t pos = avio_tell(pb), offset_pos, end_pos;
     int64_t presentation_time, duration, offset;
-    int starts_with_SAP, i, entries;
+    unsigned starts_with_SAP;
+    int i, entries;
 
     if (track->entry) {
         entries = 1;