avoid gcc warning

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35203 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/dlgcmn.cpp

@@ -57,6 +57,9 @@ public:
     // max line width or -1 to disable wrapping
     void Wrap(wxWindow *win, const wxString& text, int widthMax);
 
+    // we don't need it, but just to avoid compiler warnings
+    virtual ~wxTextWrapper() { }
+
 protected:
     // line may be empty
     virtual void OnOutputLine(const wxString& line) = 0;