lemonldap-ng doesn't handle ldap attribute equal to 0

[EOLE team]

Hello,

There is a bug with the provided lemonldap-ng focal package, it doesn't handle ldap attribute equal to 0.
We reported the issue to Lemonldap (https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2403).
They aknoledged the issue and fixed it in the master branch.
Could you apply the following patch in the package ?

Patch to apply : https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/commit/8793a5b6a128657556674daa1d9b5090c2b70c11

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: lemonldap-ng 2.0.7+ds-2
ProcVersionSignature: Ubuntu 5.4.0-59.65-generic 5.4.78
Uname: Linux 5.4.0-59-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Dec 17 14:32:08 2020
InstallationDate: Installed on 2020-12-02 (14 days ago)
InstallationMedia: EOLE 2.8.0-rc1 "Focal Fossa" - Release amd64 (20201202)
PackageArchitecture: all
SourcePackage: lemonldap-ng
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.