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
tony2012/libyuv,tony2012/libyuv,tony2012/libyuv