polar plots seems to stack points with magnitude greater than max required at the edge of the plot

[doutriaux1]

import vcs
import vcsaddons
import numpy

p = vcsaddons.createpolar()

p.list()

mag = [1,2,3,4,5]
angle = numpy.arange(5)/180.*numpy.pi

import vcs
x=vcs.init(bg=True)
p.x=x
p.magnitude_ticks = [0., .5, .75, 1, 1.5]
p.plot(mag,angle)

x.png("pol")

generates