Fix for spawning windows processes

[Fridrich Strba]

Yeah, just cooking a patch that will abstract the composition of strings
and that also fixes that leak. Stay tuned in some minutes.

Cheers

Fridrich

On Wed, 2010-04-28 at 12:41 +0300, Tor Lillqvist wrote: 
> > This patch is fixing a bug in dbus/dbus-spawn-win.c
> 
> I  wonder if it would be OK to free(env_string) after passing it to
> CreateProcessA()? The documentation is unfortunately silent on this
> matter. I assume yes, I can't see why it would be needed after
> CreateprocessA() has returned.
> 
> --tml
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