changing od_coeff to int16_t in deringing filter
changing od_coeff to int16_t in deringing filter

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