Win32 only: Thread.join() doesn't if there are multiple threads.

Win32 only: Thread.join() does not work if there are multiple threads. Thread.join(Int)
works if the argument is greater than 0.

Steps to reproduce
Compile the attached code
Run java ThreadJoinTest <some file> 2 0
// compare with ThreadJoinTest <some file> 2 1

/**
 * A class to test file io - io to same and different files.
 * @author Pavani Diwanji
*/


class bulkwriter extends Thread
{
   String fname;
   int io_size;

   bulkwriter (String fn, int ios)
   {
      super("bulkwriter " + fn);
      fname = fn;
      io_size = ios;
   }

   public void run()
   {
      // stub
      System.out.println(getName() + ".run() ends");
   }

} // end class bulkwriter


class ThreadJoinTest
{

   public void diff_io(String fname,
                       int num_threads,
int io_size,
                       int join_wait)
   {
      // local variables
      int i;
      bulkwriter w[] = new bulkwriter[num_threads];

      // message
      System.out.println("Starting diff io test..");
       
       for (i = 0; i<num_threads; ++i)
       {
          w[i] = new bulkwriter(fname+i, io_size);
          w[i].start();
       }
      
       for (i = 0; i < num_threads; ++i)
       {
          try
          {
             System.out.println("Join: " + w[i].getName());
             if (join_wait < 1)
                w[i].join();
             else
                w[i].join(join_wait);
          }
          catch (InterruptedException e)
          {
            System.out.println(e.getMessage());
          }
       } // end for(num threads)

       // message
       System.out.println("bulk writing done");

    }

   public static void print_format()
   {
      System.out.println("format: java io <filename> <#threads> <wait time>");
   }


   public static void main(String argv[])
   {
   
      int num_threads=0;
      int join_wait = -1;
   

      if ( argv.length != 3 )
      {
         print_format();
         return;
      }

      try
      {
         num_threads = Integer.parseInt(argv[1]);
         join_wait = Integer.parseInt(argv[2]);
}

      catch(Exception e)
      {
         e.printStackTrace();
         print_format();
      }

// convert to milliseconds
join_wait *= 1000;

// run test
      new ThreadJoinTest().diff_io(argv[0], num_threads, 0, join_wait);
   
   } // end main()

} // end class io