Disconnect all GTK signals referencing a wx object which is being destructed

or which is destroying the associated GTK object


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72696 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/combobox.h

@@ -56,6 +56,7 @@ public:
         Init();
         Create(parent, id, value, pos, size, choices, style, validator, name);
     }
+    ~wxComboBox();
 
     bool Create(wxWindow *parent, wxWindowID id,
                 const wxString& value = wxEmptyString,