Build: mtree: line 48: unknown group games

[Lowell Gilbert]

"Kyrre Nygård" <kyrreny at broadpark.no> writes:

> mtree: line 48: unknown group games
> *** Error code 1
>
> Is the games account really that important?

It isn't very important in itself, but having the group and user
present for a gid and uid that are in use is a bad idea.  Having them
there when not in use is relatively innocuous.