Fix some Clang warnings
Fix some Clang warnings

Fix #134

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