fix pipe file-type detection regression
fix pipe file-type detection regression

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