[Bug 42469] GetOpenFileName should expand environment variables in lpstrInitialDir

https://bugs.winehq.org/show_bug.cgi?id=42469

--- Comment #3 from Kamil Hornicek  ---
Hi
and thanks for the quick reply! Your solution works, but GetFileDialog95A needs
to be modified in the same way. I wasn't sure if it's preferable to do this
earlier and don't allocate and free memory immediately, or duplicate the code
in two places.

I should have clarified that both ANSI and Unicode versions of GetOpenFileName
should expand env. variables.