Changes to allow Cygwin to compile in non-PCH mode

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1350 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/treectrl.cpp

@@ -28,7 +28,7 @@
 #endif
 
 #ifndef WX_PRECOMP
-    #include "wx.h"
+    #include "wx/wx.h"
 #endif
 
 #if defined(__WIN95__)
@@ -54,6 +54,10 @@
 #undef GetNextSibling
 #endif
 
+#ifdef GetClassInfo
+#undef GetClassInfo
+#endif
+
 #include "wx/msw/treectrl.h"
 
 // Bug in headers, sometimes