Fixes decoder crash on invalid bitstream
Fixes decoder crash on invalid bitstream

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