Fixes: signed integer overflow: 2003010644 * 2 cannot be represented in type 
'int'
Fixes: 
19593/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RALF_fuzzer-5660628006207488

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

diff --git a/libavcodec/ralf.c b/libavcodec/ralf.c
index d8f1803086..5d88b4c943 100644
--- a/libavcodec/ralf.c
+++ b/libavcodec/ralf.c
@@ -60,7 +60,7 @@ typedef struct RALFContext {
     int     filter_bits;     ///< filter precision for the current channel data
     int32_t filter[64];
 
-    int     bias[2];         ///< a constant value added to channel data after 
filtering
+    unsigned bias[2];        ///< a constant value added to channel data after 
filtering
 
     int num_blocks;          ///< number of blocks inside the frame
     int sample_offset;
-- 
2.24.0

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