Base: fix possible Python type mismatch for Base::Vector2dPy

when using FreeCAD as a pure Python module.

See forum topic: https://forum.freecadweb.org/viewtopic.php?f=10&t=67617

src/Base/GeometryPyCXX.cpp

@@ -91,6 +91,21 @@ Base::Vector3d Py::Vector::toVector() const
 
 namespace Base {
 
+Py::PythonType& Vector2dPy::behaviors()
+{
+    return Py::PythonClass<Vector2dPy>::behaviors();
+}
+
+PyTypeObject* Vector2dPy::type_object()
+{
+    return Py::PythonClass<Vector2dPy>::type_object();
+}
+
+bool Vector2dPy::check( PyObject *p )
+{
+    return Py::PythonClass<Vector2dPy>::check(p);
+}
+
 Py::PythonClassObject<Vector2dPy> Vector2dPy::create(const Vector2d& v)
 {
     return create(v.x, v.y);

src/Base/GeometryPyCXX.h

@@ -51,6 +51,10 @@ inline Vector3<T> getVectorFromTuple(PyObject* o)
 class BaseExport Vector2dPy : public Py::PythonClass<Vector2dPy>
 {
 public:
+    static Py::PythonType &behaviors();
+    static PyTypeObject *type_object();
+    static bool check( PyObject *p );
+
     static Py::PythonClassObject<Vector2dPy> create(const Vector2d&);
     static Py::PythonClassObject<Vector2dPy> create(double x, double y);
     Vector2dPy(Py::PythonClassInstance *self, Py::Tuple &args, Py::Dict &kwds);