Update bundled freetype to 2.6.1

third_party/freetype/src/sfnt/ttkern.c

Index: third_party/freetype/src/sfnt/ttkern.c
diff --git a/third_party/freetype/src/sfnt/ttkern.c b/third_party/freetype/src/sfnt/ttkern.c
index 455e7b5e3dc1103d831db052f85aa002356b13a6..4fccc535cedc952ba99a6eb14d1e1db82aa267ea 100644
--- a/third_party/freetype/src/sfnt/ttkern.c
+++ b/third_party/freetype/src/sfnt/ttkern.c
@@ -5,7 +5,7 @@
 /*    Load the basic TrueType kerning table.  This doesn't handle          */
 /*    kerning data within the GPOS table at the moment.                    */
 /*                                                                         */
-/*  Copyright 1996-2007, 2009, 2010, 2013 by                               */
+/*  Copyright 1996-2015 by                                                 */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -108,8 +108,8 @@
         p_next = p_limit;
 
       /* only use horizontal kerning tables */
-      if ( ( coverage & ~8 ) != 0x0001 ||
-           p + 8 > p_limit             )
+      if ( ( coverage & ~8U ) != 0x0001 ||
+           p + 8 > p_limit              )
         goto NextTable;
 
       num_pairs = FT_NEXT_USHORT( p );