Fix for off by one in scale - only source should be src - 0x10001 because dest…

Fix for off by one in scale - only source should be src - 0x10001 because dest will hit exact pixel.
BUG=292
TESTED=valgrind

Review URL: https://webrtc-codereview.appspot.com/5359004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@902 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 898
+Version: 902
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 898
+#define LIBYUV_VERSION 902
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/scale_common.cc

@@ -581,7 +581,7 @@ FilterMode ScaleFilterReduce(int src_width, int src_height,
 
 #define CENTERSTART(dx, s) (dx < 0) ? -((-dx >> 1) + s) : ((dx >> 1) + s)
 #define FIXEDDIV1(src, dst) FixedDiv((src << 16) - 0x00010001, \
-                                     (dst << 16) - 0x00010001);
+                                     (dst << 16) - 0x00010000);
 
 // Compute slope values for stepping.
 void ScaleSlope(int src_width, int src_height,