BUG=244
TEST=*ScaleFrom1366x768_Box
R=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1644004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@720 16f28f9a-4ce2-e073-06de-1de4eb20be90