gtk-universal build fixes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54523 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/window.cpp

@@ -2912,7 +2912,7 @@ bool wxWindowGTK::GTKHandleFocusIn()
 
     // Notify the parent keeping track of focus for the kbd navigation
     // purposes that we got it.
-    wxChildFocusEvent eventChildFocus(this);
+    wxChildFocusEvent eventChildFocus(static_cast<wxWindow*>(this));
     GTKProcessEvent(eventChildFocus);
 
     wxFocusEvent eventFocus(wxEVT_SET_FOCUS, GetId());