Fix constant velocity predictors in the BMA MC search
Fix constant velocity predictors in the BMA MC search

They're stored at full-pel resolution, not 1/8th pel.

Results on video-1-short:
           RATE (%)  DSNR (dB)
    PSNR -0.95104  0.05093
 PSNRHVS -1.44406  0.11487
    SSIM -1.25525  0.06062
FASTSSIM -1.10287  0.06805

tribouille/daala,ascent12/daala,jmvalin/daala,nvoron23/daala,xiphmont/daala,iankronquist/daala,mbebenita/daala,KyleSiefring/daala,HeadhunterXamd/daala,kbara/daala,felipebetancur/daala,ycho/daala,jmvalin/daala,mbebenita/daala,xiph/daala,xiphmont/daala,xiph/daala,tribouille/daala,felipebetancur/daala,xiphmont/daala,xiph/daala,kustom666/daala,HeadhunterXamd/daala,iankronquist/daala,felipebetancur/daala,nvoron23/daala,tribouille/daala,ycho/daala,vr000m/daala,luctrudeau/daala,vr000m/daala,kustom666/daala,tribouille/daala,felipebetancur/daala,ascent12/daala,HeadhunterXamd/daala,kbara/daala,ascent12/daala,vr000m/daala,nvoron23/daala,kodabb/daala,kustom666/daala,kustom666/daala,nvoron23/daala,kustom666/daala,kodabb/daala,luctrudeau/daala,KyleSiefring/daala,xiph/daala,luctrudeau/daala,iankronquist/daala,mbebenita/daala,KyleSiefring/daala,ascent12/daala,xiphmont/daala,ycho/daala,felipebetancur/daala,iankronquist/daala,jmvalin/daala,luctrudeau/daala,KyleSiefring/daala,KyleSiefring/daala,ycho/daala,ycho/daala,kbara/daala,nvoron23/daala,iankronquist/daala,jmvalin/daala,kbara/daala,xiph/daala,kodabb/daala,HeadhunterXamd/daala,vr000m/daala,mbebenita/daala,xiphmont/daala,kodabb/daala,jmvalin/daala,kodabb/daala,tribouille/daala,HeadhunterXamd/daala,luctrudeau/daala,ascent12/daala,vr000m/daala,mbebenita/daala