Command-line arguments that are an empty string are discarded

[rzuckerm]

This can be demonstrated with this program:

using System;

namespace CommandLineBug;

class Program
{
    public static int Main(String[] args)
    {
        for (int count < args.Count)
        {
            Console.WriteLine($"Arg {count} = '{args[count]}'");
        }

        return 0;
    }
}

I compiled the program with tip version of Beef on a Ubuntu 22.04 Linux System. Here are some sample runs:

$ CommandLineBug/build/Debug_Linux64/CommandLineBug/CommandLineBug ""
$ CommandLineBug/build/Debug_Linux64/CommandLineBug/CommandLineBug "Hello" ""
Arg 0 = 'Hello'
$ CommandLineBug/build/Debug_Linux64/CommandLineBug/CommandLineBug "Hello" "" "There"
Arg 0 = 'Hello'
Arg 1 = 'There'
$ 

All of the above should show the empty command-line argument.

To give some context as to why I'd need to accept such a command line argument is due to the Roman Numeral project for the Sample Programs repository.

I will do a PR to fix this since I'm familiar with the C++ code that handles the command-line.