Error about wrong filename using geticon

Description

Error in journalctl about wrong filename using geticon

Distribution Name and Version

Debian buster

FusionDirectory Version

1.4

PHP version used

7

Origin of php packages

Debian

Steps to Reproduce

Play a bit with FustionDirectory (connect, create user, disconnect) and look the logs

Expected behavior:

No error

Actual behavior:

There is an error in the logs

Reproduces how often: 100%

Additional Information

Error message

 fév 19 14:24:46 buster php[2569]: FusionDirectory [unauthenticated]: (error) /usr/share/fusiondirectory/html/geticon.php of type php : Type:2, Message:readfile(): Filename cannot be empty, File:/usr/share/fusiondirectory/html/geticon.php, Line: 51