BUG=253
TESTED=ncval_x86_64.exe newlib/Release/nacltest_x86_64.nexe
R=nfullagar@chromium.org

Review URL: https://webrtc-codereview.appspot.com/1981004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@747 16f28f9a-4ce2-e073-06de-1de4eb20be90