detect functions never called for files < 35 bytes

[ssfrr]

The logic here will return the query with format"UNKNOWN" if it hits EOF while going through the magic bytes list, but some of the magic byte strings are quite long (35 bytes). So if you have a short file that relies on a detection function (like .wav), that detection file will never get called.

[timholy]

I'm pretty sure this is fixed now, but if not a MWE would be great.

EDIT: probably fixed in #295