[File] Regression from PR/139

[Christoph Biedl]

Hello,

unfortunately, the fix from PR/139, or

commit 0717383f58e5737cc4aa28446f5a8839d484caf4
Author: Christos Zoulas <christos at zoulas.com>
Date:   Thu Feb 13 18:08:49 2020 +0000

introduced a regression. Using some files from
https://github.com/file/file-tests:

db/filesystems/filetest: ERROR: Bad magic format (bad format char: .)
db/misc/core:            ERROR: Bad magic format (* not allowed in format)
db/ttf/NanumGothic.ttf:  ERROR: Bad magic format (bad format char: .)

Could you please check?

    Christoph