Plot bug with zoom and symbols (segfault)

Hi, Here is a testcase :

    > a=range(10) b=rand(10) plot(a,b,'x') axis([0.,1e-7,0.,1.])

    > Segmentation fault

Ouch -- I can repeat this with the minimal example

    from pylab import *
    plot([1,2,3], 'o')

In GTK you get

  File "/home/jdhunter/debs/matplotlib/usr/lib/python2.4/site-packages/matplotlib/backends/", line 95, in draw_arc
    self.gdkDrawable.draw_arc(gc.gdkGC, True, x, y, w, h, a1, a2)
OverflowError: long int too large to convert to int

and in *Agg you get the segfault, though PS and SVG work. It looks
like the data points are being transformed out to infinity, which is
breaking agg badly somewhere. I'll look into it.

    > Thanks for your job on matplotlib :slight_smile: Xavier.

Thanks for the report.