kernel32/tests: Fix compilation on systems that don't support nameless unions or structs.

[Francois Gouget]

On Tue, 31 Aug 2010, testbot at testbot.winehq.org wrote:
[...]
> http://testbot.winehq.org/JobDetails.pl?Key=4872
[...]
> === W98SE (32 bit process) ===
> Failure running script in VM: Exceeded timeout limit of 315 sec

This is strange. Testbot says the process timed out yet the full log has 
the expected summary line listing the tests that were run as well as the 
'process done' line so it looks like the test completed:

> process: 320 tests executed (0 marked as todo, 0 failures), 5 skipped.
> kernel32:process done (0)


-- 
Francois Gouget <fgouget at free.fr>              http://fgouget.free.fr/
          Demander si un ordinateur peut penser revient à demander
                         si un sous-marin peut nager.