Bug in plot library

​The PolyLine._path method is being called on occasion with a pair of numpy
arrays instead of Python list/tuple objects, causing it to raise a
TypeError, then seg fault.

> ./plotcanvasbug.py
Traceback (most recent call last):
  File "./plotcanvasbug.py", line 14, in <module>
    pl._Draw(graphics)
  File "T:\Python27\lib\site-packages\wxPhoenix\wx\lib\plot\plotcanvas.py",
line 1914, in _Draw
    graphics.draw(dc)
  File
"T:\Python27\lib\site-packages\wxPhoenix\wx\lib\plot\polyobjects.py", line
1421, in draw
    o.draw(dc, self._printerScale)
  File
"T:\Python27\lib\site-packages\wxPhoenix\wx\lib\plot\polyobjects.py", line
426, in draw
    self._path(dc, c1, c2, drawstyle)
  File
"T:\Python27\lib\site-packages\wxPhoenix\wx\lib\plot\polyobjects.py", line
481, in _path
    dc.DrawLines(line)
TypeError: DC.DrawLines(): argument 1 has unexpected type 'list'
Segmentation fault

I can "fix" it for this instance by just casting the coords to lists, but I
suspect there's something going wrong either above (don't pass in numpys)
or below (BufferedDC should handle numpy arrays)...

> cat plotcanvasbug.py
#!/bin/env python

import wx
import wx.lib.plot as WXP

app = wx.App()
mw = wx.Frame(parent=None, size=(500,500))
pl = WXP.PlotCanvas(parent=mw)

mw.Show()

curve = WXP.PolyLine(((0,0), (1,1)))
graphics = WXP.PlotGraphics([curve], 'Plot', 'x', 'y')
pl._Draw(graphics)

app.MainLoop()

#hack t:/Python27/Lib/site-packages/wxPhoenix/wx/lib/plot/polyobjects.py
#line 454 in _path
#        coord1, coord2 = list(coord1), list(coord2)

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