Enable bilinear instead of box filter if size of destination is greater than source / 2.

BUG=185
TEST=unittest still passes
Review URL: https://webrtc-codereview.appspot.com/1103005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@563 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 561
+Version: 563
 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 561
+#define LIBYUV_VERSION 563
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/scale.cc

@@ -3229,7 +3229,7 @@ static void ScalePlaneDown(int src_width, int src_height,
   if (!filtering) {
     ScalePlaneSimple(src_width, src_height, dst_width, dst_height,
                      src_stride, dst_stride, src_ptr, dst_ptr);
-  } else if (filtering == kFilterBilinear || src_height * 2 > dst_height) {
+  } else if (filtering == kFilterBilinear || dst_height * 2 > src_height) {
     // between 1/2x and 1x use bilinear
     ScalePlaneBilinear(src_width, src_height, dst_width, dst_height,
                        src_stride, dst_stride, src_ptr, dst_ptr);