Fix for spawning windows processes

[Ralf Habacker]

Fridrich Strba schrieb:
> Whichever test was testing the passing of environmental variables before
> should be ok for this one I guess. We are just passing the same
> environment that was passed when we used spanwnve, just in a format that
> is understood by CreateProcessA.
>   
Many thanks for your patch, which fixes also some bus-test service 
starting problems.

Regards
 Ralf