Make color_test using if statements for clamping values from 0 to 255. BUG=none TESTED=libyuvTest.TestFullYUV
Make color_test using if statements for clamping values from 0 to 255.
BUG=none
TESTED=libyuvTest.TestFullYUV

Review URL: https://webrtc-codereview.appspot.com/47479004

git-svn-id: a51711482b6ba0e1d1ab095578a045eeae45ac9a@1316 16f28f9a-4ce2-e073-06de-1de4eb20be90

okumura/libyuv,godghdai/libyuv,lemenkov/libyuv,yarrcc/libyuv-ios,lemenkov/libyuv,lyx2014/libyuv_free,disigma/yuv,lemenkov/libyuv,lyx2014/yuv,yarrcc/libyuv-ios,jpxiong/libyuv,xlncz/libyuv,godghdai/libyuv,lyx2014/libyuv_free,yarrcc/libyuv-ios,lyx2014/libyuv_free,xlncz/libyuv,godghdai/libyuv,PeterXu/libyuv,jpxiong/libyuv,Bilibili/libyuv,labdong801/libyuv,disigma/yuv,jpxiong/libyuv,labdong801/libyuv,labdong801/libyuv,Bilibili/libyuv,yarrcc/libyuv-ios,PeterXu/libyuv,lyx2014/yuv,disigma/yuv,lyx2014/yuv,PeterXu/libyuv,xlncz/libyuv,lyx2014/libyuv_free,Bilibili/libyuv,okumura/libyuv,xlncz/libyuv,lyx2014/yuv,lemenkov/libyuv,okumura/libyuv