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/filectrl.h

@@ -88,7 +88,7 @@ public:
         Create( parent, id, defaultDirectory, defaultFilename, wildCard, style, pos, size, name );
     }
 
-    virtual ~wxGtkFileCtrl() {}
+    virtual ~wxGtkFileCtrl();
 
     bool Create( wxWindow *parent,
                  wxWindowID id,