In the last position, No-EOB values and zero are all not
possible.

AWCY, objective-1-fast: -0.08% all metrics
AWCY, screen content:

PSNR YCbCr:    -0.42%    -0.42%    -0.43%
PSNRHVS:       -0.40%
SSIM:          -0.41%
MSSSIM:        -0.41%
CIEDE2000:     -0.42%

Change-Id: Iad012abfd2a48a2c9ff27512f92b27235a5a8a4a