added wxTextEntry::DoGetValue() to allow returning empty string if the control currently contains hint text

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59265 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/textentry.h

@@ -24,7 +24,6 @@ public:
 
     // implement wxTextEntryBase pure virtual methods
     virtual void WriteText(const wxString& text);
-    virtual wxString GetValue() const;
     virtual void Remove(long from, long to);
 
     virtual void Copy();
@@ -53,6 +52,9 @@ public:
     // implementation only from now on
     void SendMaxLenEvent();
 
+protected:
+    virtual wxString DoGetValue() const;
+
 private:
     // implement this to return the associated GtkEntry or another widget
     // implementing GtkEditable