[Bug 4830] Garbage in path when clicking on "My Computer" in SketchUp installer

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=4830

[e-mail] changed:

What    |Removed                     |Added
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------- Additional Comments From [e-mail]  2006-10-07 20:07 -------
The problem is in SHGetPathFromIDListW.  SHGetPathFromIDListW calls
IShellFolder_GetAttributesOf on the passed-in pidl with the SFGAO_FILESYSTEM
attribute, and fails (returns FALSE) if it's not still set after it's called. 
ISF_Desktop_fnGetAttributesOf does not set this flag for the My Computer item
(and tests show this is correct.)  Thus SHGetPathFromIDListW fails, and the app
uses an uninitialized buffer.