Fix issue with setting user last IP

[biplobice]

In Users table uLastIP is stored as hex value. But current cleaner sets the value as string which causes user inaccessible on the dashboard.

This PR fixes the issue.

[KorvinSzanto]

I'm curious if this is concrete5 version specific, I haven't looked into it but I'd assume it is

[mlocati]

I'm curious if this is concrete5 version specific, I haven't looked into it but I'd assume it is

Yep, concrete uses a strange format for the Users.uLastIP format: storing 127.0.0.1 it it causes this warning when visiting the dashboard members pages:

hex2bin(): Hexadecimal input string must have an even length

Stacktrace:
- in .../concrete/src/Utility/IPAddress.php:92
- hex2bin in .../concrete/src/Utility/IPAddress.php:92
- Concrete\Core\Utility\IPAddress:hex2bin in .../concrete/src/Utility/IPAddress.php:66
- Concrete\Core\Utility\IPAddress:getIp in .../concrete/src/User/UserInfo.php:860
- Concrete\Core\User\UserInfo:getLastIPAddress in .../concrete/single_pages/dashboard/users/search/edit.php:79
[...]