advapi32: Only require a domain in the username for CRED_PERSIST_ENTERPRISE credentials.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
http://testbot.winehq.org/JobDetails.pl?Key=22306

Your paranoid android.


=== WXPPROSP3 (32 bit cred) ===
cred.c:128: Test failed: CredWriteA failed with error 2202
cred.c:131: Test failed: CredDeleteA failed with error 1168
cred.c:135: Test failed: CredWriteA failed with error 1312
cred.c:138: Test failed: CredDeleteA failed with error 1168
cred.c:149: Test failed: CredWriteA failed with error 2202
cred.c:152: Test failed: CredDeleteA failed with error 1168

=== W2K3R2SESP2 (32 bit cred) ===
cred.c:128: Test failed: CredWriteA failed with error 2202
cred.c:131: Test failed: CredDeleteA failed with error 1168
cred.c:135: Test failed: CredWriteA failed with error 1312
cred.c:138: Test failed: CredDeleteA failed with error 1168
cred.c:149: Test failed: CredWriteA failed with error 2202
cred.c:152: Test failed: CredDeleteA failed with error 1168