Fix "Command Group" override type admin flags

[Sikarii]

Fixes "Command Group" override type getting set wrong flags upon the creation of the command group override.

One way to test this broken behaviour is to:

1. Create an admin command with ADMFLAG_ROOT admin flags initially and assign it under a command group MyTestGroup.
   • RegAdminCmd("sm_testcommand", Command_Test, ADMFLAG_ROOT, "Description", "MyTestGroup");
2. Create a command group override within admin_overrides.cfg - "@MyTestGroup" "".
3. Make sure you do not have ROOT permissions, boot up the server and observe that you cannot access "sm_testcommand".

[asherkin]

Thanks for the fix - I love how this one survived the ages.

It must be almost 10 years since I also tried to setup command group overrides and just went "well that doesn't work" - so great job digging into it and fixing them!

[ambaca]

I have tried to test "Command group" one whole day for nothing :D dam bug.