Add virtual destructor

source/ArmarXGui/libraries/SimpleConfigDialog/SimpleConfigDialog.h

@@ -147,6 +147,7 @@ namespace armarx
 
         struct SimpleConfigDialogAdderBase
         {
+            virtual ~SimpleConfigDialogAdderBase() = default;
             virtual armarx::IceProxyFinderBase* createIceProxyFinder(SimpleConfigDialog* d)
             {
                 return nullptr;