parametrics(warning): Cannot make a NURBS from the indicated curve: segfaults.

[Treeform]

parametrics(warning): Cannot make a NURBS from the indicated curve
after this message the game segfaults

from pandac.PandaModules import *
cf = CurveFitter()
cf.addXyz(0,Vec3(0,0,0))
nurbs = cf.makeNurbs() # can't make nerbs with one point
pos = Vec3()
nurbs.evaluateXyz(0,pos) # now we will crash trying to eval it
print " ^ segfault at that line"

windows 32, panda 1.6.2

[Treeform (starplant)]

was not checking for default_curve is null.