Fixes: timeout
Fixes: 
66783/clusterfuzz-testcase-minimized-ffmpeg_dem_GENH_fuzzer-5356884892647424

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
 libavformat/id3v2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
index d83716dcf4..e0a7e3f3ea 100644
--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -370,7 +370,7 @@ static void read_uslt(AVFormatContext *s, AVIOContext *pb, 
int taglen,
     int encoding;
     int ok = 0;
 
-    if (taglen < 1)
+    if (taglen < 4)
         goto error;
 
     encoding = avio_r8(pb);
-- 
2.17.1

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