add the HTML string of the selected item to wxSimpleHtmlListBox events (closes #10159)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57643 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/vlbox.h

@@ -249,6 +249,7 @@ protected:
 
     // send the wxEVT_COMMAND_LISTBOX_SELECTED event
     void SendSelectedEvent();
+    virtual void InitEvent(wxCommandEvent& event, int n);
 
     // common implementation of SelectAll() and DeselectAll()
     bool DoSelectAll(bool select);