title: wxpython 3.0 breaks older apps? (locale error)
body: <p>I had an app that was working properly with old verions of wxpython</p>
  
  <p>Now with wxpython 3.0, when trying to run the app, I get the following error</p>
  
  <pre><code>  File "C:\Python27\lib\site-packages\wx-3.0-msw\wx\_controls.py", line 6523, in __init__
      _controls_.DatePickerCtrl_swiginit(self,_controls_.new_DatePickerCtrl(*args, **kwargs))
  wx._core.PyAssertionError: C++ assertion "strcmp(setlocale(LC_ALL, NULL), "C") == 0" failed at ..\..\src\common\intl.cpp(1449) in wxLocale::GetInfo(): You probably called setlocale() directly instead of using wxLocale and now there is a mismatch between C/C++ and Windows locale.
  Things are going to break, please only change locale by creating wxLocale objects to avoid this!
  </code></pre>
  
  <p>the error comes from this line</p>
  
  <pre><code>File "C:\Users\hadi\Dropbox\Projects\Python\dialysis\profile.py", line 159, in __init__
      style=wx.DP_DROPDOWN)
  </code></pre>
  
  <p>Help is much appreciated</p>