[FFmpeg-cvslog] avcodec/cabac_functions: Fix "left shift of negative value -31767"

[Michael Niedermayer]

ffmpeg | branch: release/2.5 | Michael Niedermayer <michael at niedermayer.cc> | Fri Nov 27 12:11:29 2015 +0100| [cc80478463dd1816836ffd2b8b92f4daa957021d] | committer: Michael Niedermayer

avcodec/cabac_functions: Fix "left shift of negative value -31767"

Fixes: 1430e9c43fae47a24c179c7c54f94918/signal_sigsegv_421427_2340_591e9810c7b09efe501ad84638c9e9f8.264

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Found-by: xiedingbao (Ticket4727)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit a1f6b05f5228979dab0e149deca7a30d22e98af5)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cc80478463dd1816836ffd2b8b92f4daa957021d
---

 libavcodec/cabac_functions.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/cabac_functions.h b/libavcodec/cabac_functions.h
index 15dba29..4e13253 100644
--- a/libavcodec/cabac_functions.h
+++ b/libavcodec/cabac_functions.h
@@ -74,7 +74,8 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){
 
 #ifndef get_cabac_inline
 static void refill2(CABACContext *c){
-    int i, x;
+    int i;
+    unsigned x;
 
     x= c->low ^ (c->low-1);
     i= 7 - ff_h264_norm_shift[x>>(CABAC_BITS-1)];