Under Cygwin, in platform.h default to wxMSW unless otherwise specified.

Do not #define __WIN95__, __WINDOWS__, __WXMSW__ on the command line for
Cygwin/MinGW (when build with makefiles), since platform.h already does
that for us.
  Always check for __WIN32__, not for WIN32 or _WIN32 (just for
consistency).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18793 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -5025,7 +5025,7 @@ void wxSetKeyboardHook(bool doIt)
 
         // avoids warning about statement with no effect (FreeProcInstance
         // doesn't do anything under Win32)
-#if !defined(WIN32) && !defined(_WIN32) && !defined(__WIN32__) && !defined(__NT__) && !defined(__GNUWIN32__)
+#if !defined(__WIN32__) && !defined(__NT__)
         FreeProcInstance(wxTheKeyboardHookProc);
 #endif
     }