This will facilitate later experiments reducing the precision
of probabilities.

after_cdf_table_rewrite-3 -> before_cdf_table_rewrite-3

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0000 |  0.0000 |  0.0000 |   0.0000 | 0.0000 |  0.0000 |     0.0000

Change-Id: Ief01b4d7fdca075c41e9add079f7ac836dafcfbe