bilinear scaling allow higher error for differences in SSSE3 7 bit math vs C/SSE2 15 bit math, when extreme scale factors are used.
BUG=200
TEST=*Scale* width LIBYUV_WIDTH=16 LIBYUV_HEIGHT=16
Review URL: https://webrtc-codereview.appspot.com/1197004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@606 16f28f9a-4ce2-e073-06de-1de4eb20be90
4 files changed