[FFmpeg-cvslog] avformat/vapoursynth: properly initialize err variable in read_header_vs()

[nu774]

ffmpeg | branch: master | nu774 <honeycomb77 at gmail.com> | Fri Jan  4 02:17:02 2019 +0900| [e0686318ddd7a5138d1847d97fe967fb2e813802] | committer: Michael Niedermayer

avformat/vapoursynth: properly initialize err variable in read_header_vs()

The variable "err" is not initialized, and set only when something went wrong.
When everything is OK, nobody sets it, so using it result in UB.

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e0686318ddd7a5138d1847d97fe967fb2e813802
---

 libavformat/vapoursynth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/vapoursynth.c b/libavformat/vapoursynth.c
index f3ad6910e5..69fde1a806 100644
--- a/libavformat/vapoursynth.c
+++ b/libavformat/vapoursynth.c
@@ -177,7 +177,7 @@ static av_cold int read_header_vs(AVFormatContext *s)
     char dummy;
     const VSVideoInfo *info;
     struct VSState *vss_state;
-    int err;
+    int err = 0;
 
     vss_state = av_mallocz(sizeof(*vss_state));
     if (!vss_state) {