[Bug 20697] Some applications do not correctly detect administrative privileges

http://bugs.winehq.org/show_bug.cgi?id=20697

--- Comment #3 from Rob Shearman   2009-11-15 10:51:10 ---
Not a regression in terms of the new code, but new code path being executed
(uac.IsAdmin) that depended on EqualSid setting last error to ERROR_SUCCESS,
otherwise the last error would remain as ERROR_INSUFFICIENT_BUFFER as a result
of calling GetTokenInformation for TokenGroups with a 0 size to get the size
needed.