BUG=none
TEST=I4*ToI4*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/4969004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@892 16f28f9a-4ce2-e073-06de-1de4eb20be90