[parrot/parrot] 534f0a: revert part of 6ecb09f0ed, it's not the right way

[GitHub]

  Branch: refs/heads/threads
  Home:   https://github.com/parrot/parrot
  Commit: 534f0a46281ba48a15cc5c23228195c05c316efa
      https://github.com/parrot/parrot/commit/534f0a46281ba48a15cc5c23228195c05c316efa
  Author: Jimmy Zhuo <zhuomingliang at yahoo.com.cn>
  Date:   2012-04-29 (Sun, 29 Apr 2012)

  Changed paths:
    M include/parrot/thr_windows.h

  Log Message:
  -----------
  revert part of 6ecb09f0ed, it's not the right way