Correct bugs in VP8 error residue image output
Correct bugs in VP8 error residue image output

X/Y on each block of output was swapped
center output on gray to match Daala output

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