[PATCH 05/12] (resend) LookupAccountNameW() - correct call in SetEntriesInAclW()

[Paul Bryan Roberts]

LookupAccountNameW() has a stubbed but non-empty, incomplete, buggy
implementation.  It fails a number of unit tests but Wine code relies on
this.

This is series of patches that provide what may be a reasonable first
pass implementation of LookupAccountNameA() and LookupAccountNameW() that:

    - passes existing units tests for LookupAccountName
    - works for well known SIDs
    - works for 'first user account'
    - allows progress towards the resolution of Bug 14334

This patch fixes a regression before it happens.

The implementation of SetEntriresInAclW() (in this source file, namely
dlls/advapi32/security.c) passes NULL for the domain name parameter and
0 as its length because it does not want to know about domains.

However, the conformance tests in test_LookupAccountName() (in
dlls/advapi32/tests/security.c) include a case that passes NULL and 0 in
this way and expects the call to fail with ERROR_INSUFFICIENT_BUFFER.
Therefore, fixing this unit test would break some other unit test.

So, this patch fixes SetEntriesInAclW() before it is broken.  It is
conformance test neutral.

Why use MAX_COMPUTERNAME_LENGTH + 1 ?  Originally, I implemented the
ninth (tenth now I think) patch before this one.  In that patch, the 
computer name is used as the domain name so this seemed like a sensible 
upper bound.



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