[FFmpeg-cvslog] avformat/subfile: Assert that whence is a known case

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Jun  8 20:46:28 2024 +0200| [426d8c84c37064eef93bbcfaffd886d00a9a4ee8] | committer: Michael Niedermayer

avformat/subfile: Assert that whence is a known case

This may help CID1452449 Uninitialized scalar variable

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=426d8c84c37064eef93bbcfaffd886d00a9a4ee8
---

 libavformat/subfile.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/subfile.c b/libavformat/subfile.c
index eedac1524e..be48ef72ef 100644
--- a/libavformat/subfile.c
+++ b/libavformat/subfile.c
@@ -18,6 +18,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/avassert.h"
 #include "libavutil/avstring.h"
 #include "libavutil/opt.h"
 #include "url.h"
@@ -135,6 +136,8 @@ static int64_t subfile_seek(URLContext *h, int64_t pos, int whence)
     case SEEK_END:
         new_pos = end + pos;
         break;
+    default:
+        av_assert0(0);
     }
     if (new_pos < c->start)
         return AVERROR(EINVAL);