[Bug 51815] DocumentProperties broken by last update (x64 only)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51815

Bernhard Übelacker  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #8 from Bernhard Übelacker  ---
Created attachment 70734
  --> https://bugs.winehq.org/attachment.cgi?id=70734
Return in a 64-bit process the x64 printer driver subdirectory.

It looks like the validate_envW function returns currently
for 64-bit processes the 32-bit driver subdirectory.

This patch is an attempt to change this and seems to be at least
for the "wine64 notepad" case an improvement.