[freetype2] master d8ef726: [sfnt] Avoid left shift of negative value (#48980).

[Werner LEMBERG]

branch: master
commit d8ef726611459a40e4e27a6602855bc27535a548
Author: Werner Lemberg <address@hidden>
Commit: Werner Lemberg <address@hidden>

    [sfnt] Avoid left shift of negative value (#48980).
    
    * src/sfnt/ttsbit.c (tt_sbit_decoder_load_bit_aligned): Use unsigned
    constant.
---
 ChangeLog         |    9 ++++++++-
 src/sfnt/ttsbit.c |    2 +-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index f786a8a..e998fa7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,11 @@
-2016-09-02  Werner Lemberg  <address@hidden>.
+2016-09-02  Werner Lemberg  <address@hidden>
+
+       [sfnt] Avoid left shift of negative value (#48980).
+
+       * src/sfnt/ttsbit.c (tt_sbit_decoder_load_bit_aligned): Use unsigned
+       constant.
+
+2016-09-02  Werner Lemberg  <address@hidden>
 
        * src/smooth/ftgrays.c (gray_hline): Fix clang compiler warnings.
 
diff --git a/src/sfnt/ttsbit.c b/src/sfnt/ttsbit.c
index 5b7a123..36c261d 100644
--- a/src/sfnt/ttsbit.c
+++ b/src/sfnt/ttsbit.c
@@ -881,7 +881,7 @@
         }
 
         *pwrite++ |= ( ( rval >> nbits ) & 0xFF ) &
-                     ( ~( 0xFF << w ) << ( 8 - w - x_pos ) );
+                     ( ~( 0xFFU << w ) << ( 8 - w - x_pos ) );
         rval     <<= 8;
 
         w = line_bits - w;