gdi32/tests: Use if(0) instead of #if 0 to make sure the code still compiles.

[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=25164

Your paranoid android.


=== WINEBUILD (build) ===
Patch failed to apply