implement wxRadioBox::Reparent(): it didn't reparent the radio buttons (patch 1891030)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51905 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/radiobox.h

@@ -111,6 +111,8 @@ public:
     }
 #endif // wxUSE_HELP
 
+    virtual bool Reparent(wxWindowBase *newParent);
+
     // we inherit a version always returning false from wxStaticBox, override
     // it to behave normally
     virtual bool AcceptsFocus() const { return wxControl::AcceptsFocus(); }