[PATCH] kernel32/tests: Don't test functions directly when reporting GetLastError()

[Marvin]

Hi,

While running your changed tests, 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=55045

Your paranoid android.


=== wxppro (32 bit report) ===

kernel32:
0b34:actctx: unhandled exception c0000005 at 7C910567

=== w2003std (32 bit report) ===

kernel32:
01ac:actctx: unhandled exception c0000005 at 7C82CE70