Fix crash in WritePrivateProfileString

[Dimitrie O. Paun]

On Tue, 27 May 2003, Thomas Charbonnel wrote:

> Hi,
> 
> This fixes a crash in WritePrivateProfileString when the lpFileName
> parameter was NULL. The behaviour is modeled after what I tested on
> Windows machines: 9x/Me returns FALSE and nothing is done, NT/2K/XP
> attempts to write the entry in the win.ini file and returns the
> appropriate value.

I think it's way too complicated for no good reason. Just do what
NT does:

    if (!filename) filename = wininiW;

It's just one line vs. 10+.

-- 
Dimi.