wx crashes on exit if figure not shown and not explicitly closed #3316
Description
On windows, with the wxagg backend, if the figure is not explicitly closed, python crashes. This crashes:
python -c "import matplotlib.pyplot as plt; plt.plot([0,1],[1,4])"versions:
C:\Users\Belli>python
Python 2.7.6 |Continuum Analytics, Inc.| (default, May 27 2014, 15:00:33) [MSC v.1500 64 bit (AMD64)] on win32
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>>> import matplotlib
>>> matplotlib.__version__
'1.3.1'
>>> import wx
>>> wx.version()
'3.0.0.0 msw (classic)'