kernel32: Implement GetVolumePathName.

[Dan Kegel]

On Tue, Oct 4, 2011 at 8:58 AM, Erich Hoover <compholio at gmail.com> wrote:
>> Fails test here?
>> ...
>>
>> 3 RtlDosPathNameToNtPathName_U+0x35c(dos_path="C:\windows\system32",
>> ntpath=0x32fbb4, file_part=(nil), cd=(nil)) [dlls/ntdll/path.c:394]
>>  4 GetVolumePathNameW+0x107(filename="C:\windows\system32",
>> volumepathname="?Ir\sandbox\slave\(", buflen=0x14)
>> [dlls/kernel32/volume.c:1767]
>
> That test succeeds on my box... That is also a particularly odd place for it
> to segfault, I really don't see how RtlDosPathNameToNtPathName_U could
> possibly screw up with that pathname.

Might be an unrelated flakiness.  I'll run it in a loop here and see if I can
get it to happen again.
- Dan