clear errno after it could be set to avoid confusing errors.
clear errno after it could be set to avoid confusing errors.

bwalex/tc-play,Nmishin/tc-play,veracrypt/tc-play,Nmishin/tc-play,bwalex/tc-play,bwalex/tc-play,Nmishin/tc-play,veracrypt/tc-play,veracrypt/tc-play