[Crash] Fixes a crash when the faction_list db table is empty.

[KimLS]

Description

If you have no data in the faction_list table then zone server will crash on startup because the query for max # of rows returns null instead of zero when there's no entries in the table.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Testing

I've tested before and after the change. It no longer crashes.

Clients tested:

Checklist

• I have tested my changes
• I have performed a self-review of my code. Ensuring variables, functions and methods are named in a human-readable way, comments are added only where naming of variables, functions and methods can't give enough context.
• I own the changes of my code and take responsibility for the potential issues that occur