Fixes: signed integer overflow: 2146907204 + 26846088 cannot be represented in 
type 'int'
Fixes: 
8105/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVPACK_fuzzer-6233036682166272

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

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 22a2c83a30..8306ec020f 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -85,7 +85,7 @@ typedef struct WavpackContext {
 
 #define LEVEL_DECAY(a)  (((a) + 0x80) >> 8)
 
-static av_always_inline int get_tail(GetBitContext *gb, int k)
+static av_always_inline unsigned get_tail(GetBitContext *gb, int k)
 {
     int p, e, res;
 
-- 
2.17.1

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