dpoint mutates x-coord in y-property (see #1794) (#1866)

tools/python/src/vector.cpp

@@ -457,7 +457,7 @@ void bind_vector(py::module& m)
             .def("__str__", &dpoint__str__)
             .def("normalize", &type::normalize, "Returns a unit normalized copy of this vector.")
             .def_property("x", &dpoint_x, [](dpoint& p, double x){p.x()=x;}, "The x-coordinate of the dpoint.")
-            .def_property("y", &dpoint_y, [](dpoint& p, double y){p.x()=y;}, "The y-coordinate of the dpoint.")
+            .def_property("y", &dpoint_y, [](dpoint& p, double y){p.y()=y;}, "The y-coordinate of the dpoint.")
             .def(py::self + py::self)
             .def(py::self - py::self)
             .def(py::self / double())