user32/tests: Test return value of EnumDesktopsA (PVS-Studio)

[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
https://testbot.winehq.org/JobDetails.pl?Key=12320

Your paranoid android.


=== w2000pro (32 bit winstation) ===
winstation.c:688: Test failed: EnumDesktopsA failed!

=== wvistau64 (64 bit winstation) ===
winstation.c:688: Test failed: EnumDesktopsA failed!

=== w2008s64 (64 bit winstation) ===
winstation.c:688: Test failed: EnumDesktopsA failed!