Bugfix in CLPF RDO.  Prevented selection of enable_fb_flag=0.
Bugfix in CLPF RDO.  Prevented selection of enable_fb_flag=0.

PSNR YCbCr:     -0.01%     -0.06%     -0.17%
   PSNRHVS:      0.01%
      SSIM:      0.03%
    MSSSIM:      0.00%
 CIEDE2000:     -0.05%

Change-Id: I1205c021bfc5cee6f80344fec92aabb529af9bd1

mbebenita/aom,mbebenita/aom,smarter/aom,GrokImageCompression/aom,smarter/aom,mbebenita/aom,luctrudeau/aom,luctrudeau/aom,smarter/aom,smarter/aom,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,luctrudeau/aom,smarter/aom,mbebenita/aom,luctrudeau/aom,luctrudeau/aom,GrokImageCompression/aom,smarter/aom,mbebenita/aom,GrokImageCompression/aom,GrokImageCompression/aom,mbebenita/aom,mbebenita/aom,GrokImageCompression/aom