[FFmpeg-cvslog] avcodec/pgssubdec: Fix left shift of 255 by 24 places cannot be represented in type int

[Michael Niedermayer]

ffmpeg | branch: release/2.7 | Michael Niedermayer <michael at niedermayer.cc> | Fri Dec  4 21:38:12 2015 +0100| [0a06e2824a675fb778cd98ccab35a8936db569b9] | committer: Michael Niedermayer

avcodec/pgssubdec: Fix left shift of 255 by 24 places cannot be represented in type int

Fixes: b293a6479bb4b5286cff24d356bfd955/asan_generic_225c3c9_7819_cc526b657450c6cdef1371b526499626.mkv

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 4f2419888ba49245761f4ab343679c38e7880cfe)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0a06e2824a675fb778cd98ccab35a8936db569b9
---

 libavcodec/pgssubdec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/pgssubdec.c b/libavcodec/pgssubdec.c
index 0d307f5..e567f53 100644
--- a/libavcodec/pgssubdec.c
+++ b/libavcodec/pgssubdec.c
@@ -33,7 +33,7 @@
 #include "libavutil/imgutils.h"
 #include "libavutil/opt.h"
 
-#define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
+#define RGBA(r,g,b,a) (((unsigned)(a) << 24) | ((r) << 16) | ((g) << 8) | (b))
 #define MAX_EPOCH_PALETTES 8   // Max 8 allowed per PGS epoch
 #define MAX_EPOCH_OBJECTS  64  // Max 64 allowed per PGS epoch
 #define MAX_OBJECT_REFS    2   // Max objects per display set