Catch attempts to create a window with itself as parent.

This doesn't happen often but when it does, the results are catastrophic and
not always easy to debug, so try catch this as soon as possible.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73139 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/window.h

@@ -752,7 +752,7 @@ public:
     bool IsDescendant(wxWindowBase* win) const;
 
         // it doesn't really change parent, use Reparent() instead
-    void SetParent( wxWindowBase *parent ) { m_parent = (wxWindow *)parent; }
+    void SetParent( wxWindowBase *parent );
         // change the real parent of this window, return true if the parent
         // was changed, false otherwise (error or newParent == oldParent)
     virtual bool Reparent( wxWindowBase *newParent );