ofPath::arc adding radial line

From the forums:
https://forum.openframeworks.cc/t/arc-without-drawing-radius-lines/24343

Note this issue appears with current master.

The following code produces an unexpected straight line:

    ofPath path;

    //draw an arc with a center starting at 300, 300, radius of 150 over 180 degrees
    //should appear like a semi-circle
    path.arc(300, 300, 150, 150, -180, 0);
    path.setFilled(false);
    path.setStrokeWidth(1);

    path.draw();

But ofPolyline::arc looks correct.

    ofPolyline poly;

    //draw an arc with a center starting at 300, 300, radius of 150 over 180 degrees
    //should appear like a semi-circle
    poly.arc(300, 300, 150, 150, -180, 0);

   poly.draw();