Missing child ListOfCurveSegments for RenderCurve

[luciansmith]

In the render spec, fig 11, a 'RenderCurve' object may have a child ListOfCurveSegments. This is, as far as I can tell, not implemented in libsbml at all.

[fbergmann]

Looking through the code, the listOfCurveSegments seems to be considered 'old' style. And is still read by the underlying rendergroup where it gets converted to the listOfElements. Why this is in the group and not in the curve i cannot say.