[PATCH] devenum: Add tests for devenum.

[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=17507

Your paranoid android.


=== WNT4WSSP6 (32 bit devenum) ===
devenum.c:59: Test failed: Cannot create CLSID_SystemDeviceEnum object (res = 80040154)