dlls/kernel32/path.c: Fix return values for UNC pathnames in GetLongPathNameW

[Alexandre Hardy]

The MSDN:
    http://msdn.microsoft.com/en-us/library/aa364980(VS.85).aspx
states that GetLongPathNameW returns the length of the string
required to hold the pathname if the buffer is too small to hold
the path. In the case where the buffer is too small, the filename
should not be stored in the buffer.

This ensures that the buffer is not written to (for UNC pathnames)
if the buffer is not large enought to store the path.

Kind regards
Alexandre

-- 
--------------------------------------------------
Alexandre Hardy
http://www.ahardy.za.net

[Paul Vriens]

On 11/24/2009 02:41 PM, Alexandre Hardy wrote:
> The MSDN:
>      http://msdn.microsoft.com/en-us/library/aa364980(VS.85).aspx
> states that GetLongPathNameW returns the length of the string
> required to hold the pathname if the buffer is too small to hold
> the path. In the case where the buffer is too small, the filename
> should not be stored in the buffer.
>
> This ensures that the buffer is not written to (for UNC pathnames)
> if the buffer is not large enought to store the path.
>
> Kind regards
> Alexandre

Hi Alexandre,

Patches should go to wine-patches unless your asking for some guidance 
or comments.

This one should also be accompanied with some tests.

-- 
Cheers,

Paul.