[Distutils] bugfix for GUI.exe launcher

[Phillip J. Eby]

At 02:22 PM 1/3/2008 -0500, Alexander Michael wrote:
>I raised this issue in the beginning of December [1]_ but haven't
>received a response yet (nor have I seen it corrected in the SVN). I
>would like to see this corrected, but I was under the impression that
>bug reports for setuptools should be sent to the distutils-sig
>mailling list. Do you know how we should next proceed to get this
>fixed?

I've been having difficulty reproducing the error, so it's hard for 
me to confirm that the patch fixes it.  If somebody wants to extend 
their patch to include a test that fails on their system without the 
patch but succeeds with it, I'd be happy to go ahead and include it.

See setuptools/tests/win_script_wrapper.txt for the existing test 
code, which currently only covers the CLI wrapper, not the GUI one.