Small Main.cs fix

[Ohms_Law]

Here's a silly little fix that I just noticed that someone might be interested in.

In RunUO 1.0,
Main.cs Line 628, originally:

            timerThread.Join();
            Console.WriteLine( "done" );

now, if you compile and run the RunUO server without scripts, or simply fail it somehow, you'll receive a:
System.Threading.ThreadStateException was unhandled
Message="Thread has not been started."
Source="mscorlib"
StackTrace:
at System.Threading.Thread.JoinInternal()
at System.Threading.Thread.Join()
at Server.Core.HandleClosed()
at Server.Core.CurrentDomain_ProcessExit(Object sender, EventArgs e)

here's something that I came up with in five minutes to "fix" this little issue:

            if (timerThread.ThreadState == System.Threading.ThreadState.Running)
                timerThread.Join();
            else
                timerThread.Abort();

of course, the 2.0 version may have changed this all completely...
*shrug*

Takes care of the Exception at least.