BUG=346
TESTED=set GYP_DEFINES=target_arch=ia32 libyuv_disable_jpeg=1 & python gyp_libyuv -fninja -G msvs_version=2010 libyuv_test.gyp
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/16989004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1038 16f28f9a-4ce2-e073-06de-1de4eb20be90