Clean up od_resample_luma_coeffs() a bit.
Clean up od_resample_luma_coeffs() a bit.

Constant data should be const (and should follow the style guide).

The buffer of coefficients used to predict _chroma_ should probably
 not be called 'l' and the buffer of _luma_ coefficients used to
 form the predictor should probably not be called 'c'.

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