Sorry for the bad link... Here's the correct one:
https://github.com/wxWidgets/wxWidgets/commit/5cbb4a59ce0ae0ac4e3ed4d86d4338a497ceeab2#L0R205
···
-----Original message-----
From: Boštjan Mejak
Sent: 10.05.2013, 09:12
To: wxpython-users@googlegroups.com
Subject: A message for vadz
Hello, vadz 
I think I know why does the test fail... Please examine this line of code:
https://github.com/wxWidgets/commit/5cbb4a59ce0ae0ac4e3ed4d86d4338a497ceeab2#L0R205
Notice in the line 205 of this code that __WXGTKK__ should be fixed to __WXGTK__ (one K deleted).
I hope that'll fix the test. Please report back if it did or not.