advapi32: Set values to 0 in LsaEnumerateAccountRights

[Ge van Geldorp]

This fixes http://bugs.winehq.org/show_bug.cgi?id=18797
Rights are usually assigned to groups, not directly to user accounts. When
you pass the SID of a user account to LsaEnumerateAccountRights() and that
user account does not have privileges explicitly assigned to it the
function will return STATUS_OBJECT_NAME_NOT_FOUND. However, Windows will
also set the Rights and RightsCount values to NULL/0. The installer in bug
18797 depends on that behavior.
Also adding test case for this.

Changelog:
  advapi32: Set values to 0 in LsaEnumerateAccountRights

---
 dlls/advapi32/lsa.c       |    2 ++
 dlls/advapi32/tests/lsa.c |   45
+++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 43 insertions(+), 4 deletions(-)



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