Fixes: negation of -2147483648 cannot be represented in type 'int32_t' (aka 
'int'); cast to an unsigned type to negate this value to itself
Fixes: assertiomnm failure
Fixes: 
29102/clusterfuzz-testcase-minimized-ffmpeg_dem_DXA_fuzzer-6744985740378112

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

diff --git a/libavformat/dxa.c b/libavformat/dxa.c
index 909c5ba2ba..cd9c489851 100644
--- a/libavformat/dxa.c
+++ b/libavformat/dxa.c
@@ -79,7 +79,7 @@ static int dxa_read_header(AVFormatContext *s)
     if(fps > 0){
         den = 1000;
         num = fps;
-    }else if (fps < 0){
+    }else if (fps < 0 && fps > INT_MIN){
         den = 100000;
         num = -fps;
     }else{
-- 
2.17.1

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