added override to MBDynElement to make mac happy

OndselSolver/MBDynElement.cpp

@@ -5,3 +5,7 @@ using namespace MbD;
 void MbD::MBDynElement::initialize()
 {
 }
+
+void MBDynElement::parseMBDyn(std::vector<std::string> &lines) {
+    MBDynItem::parseMBDyn(lines);
+}

OndselSolver/MBDynElement.h

@@ -13,6 +13,7 @@ namespace MbD {
     class MBDynElement : public MBDynItem
     {
     public:
+        void parseMBDyn(std::vector<std::string>& lines) override;
         void initialize() override;
 
     };