pvq: use integer approximation of 1/sqrt(yy)
pvq: use integer approximation of 1/sqrt(yy)

ntt-short1:
          LOW (%)  MEDIUM (%) HIGH (%)
    PSNR  0.024490 -0.040817 -0.014121
 PSNRHVS -0.013162 -0.037544 -0.011743
    SSIM  0.014436  0.044625  0.006359
FASTSSIM -0.056836 -0.133870 -0.194080

subset1:
          RATE (%)  DSNR (dB)
    PSNR 0.00341  -0.00014
 PSNRHVS 0.00705  -0.00048
    SSIM 0.00390  -0.00014
FASTSSIM 0.05442  -0.00172

xiphmont/daala,xiphmont/daala,jmvalin/daala,jmvalin/daala,luctrudeau/daala,jmvalin/daala,xiphmont/daala,ycho/daala,HeadhunterXamd/daala,xiph/daala,luctrudeau/daala,xiphmont/daala,xiph/daala,ycho/daala,HeadhunterXamd/daala,ycho/daala,luctrudeau/daala,ycho/daala,HeadhunterXamd/daala,HeadhunterXamd/daala,jmvalin/daala,xiph/daala,xiph/daala,xiphmont/daala,xiph/daala,jmvalin/daala,luctrudeau/daala,ycho/daala,luctrudeau/daala,HeadhunterXamd/daala