Add support for 24-bit PCM raw, wav, & flac files. Needed to fix-up some const-correctness in other function headers.
Add support for 24-bit PCM raw, wav, & flac files.
Needed to fix-up some const-correctness in other function headers.

pcqpcq/sox,Distrotech/sox,davel/sox,Motiejus/sox,cbagwell/sox,pcqpcq/sox,jacksonh/sox,jacksonh/sox,uklauer/sox,Motiejus/sox,davel/sox,Distrotech/sox,Distrotech/sox,CaptainHayashi/sox,cbagwell/sox,pcqpcq/sox,MageSlayer/sox,MageSlayer/sox,mhartzel/sox_personal_fork,Motiejus/sox,davel/sox,uklauer/sox,mhartzel/sox_personal_fork,CaptainHayashi/sox,uklauer/sox,jacksonh/sox,MageSlayer/sox,pcqpcq/sox,CaptainHayashi/sox,mhartzel/sox_personal_fork,MageSlayer/sox,cbagwell/sox,cbagwell/sox,Motiejus/sox,jacksonh/sox,MageSlayer/sox,mhartzel/sox_personal_fork,uklauer/sox,Distrotech/sox,davel/sox,CaptainHayashi/sox