Bug 20385: Don't try to get info for bad authtypecodes

Bug 20385: Don't try to get info for bad authtypecodes

TO test:
0 - Have a koha with ES enabled and some auth records
1 - backup your db
2 - sudo koha-mysql <<instance>>
3 - UPDATE auth_types SET authtypecode="PERSO_NAMB" WHERE
authtypecode="PERSO_NAME" (or adjust as necessary)
4 - Search for some authorities where a PERSO_NAME record will be
returned
5 - KA_BOOM!
6 - Apply patch
7 - Results are returned, they do not display a code, viewing record you
won't see code

Signed-off-by: Nicolas Legrand <nicolas.legrand@bulac.fr>
Signed-off-by: Alex Arnaud <alex.arnaud@biblibre.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>