title: wx.ListBox.HitTest not working on Mac
body: <p>The following code sample works under linux (ubuntu) and Windows XP, but not under OSX.</p>
  
  <pre><code>import wx
  class frame(wx.Frame):
      def __init__(self,p=None):
          wx.Frame.__init__(self,p)
          self.box = wx.ListBox(self)
          self.box.AppendItems( ["Zero","One","Two","Three","Four","Five","Six"])
          self.box.Bind(wx.EVT_MOUSE_EVENTS,self.onMouse)
      def onMouse(self,evt):
          pos = evt.GetPosition()
          print self.box.HitTest(pos)
          evt.Skip()
  class guiApp(wx.App):
      def __init__(self,redirect=False):
          wx.App.__init__(self,redirect)
      def OnInit(self):
          f = frame()
          f.Show()
          self.SetTopWindow(f)
          return True
  if __name__=="__main__":
      app = guiApp()
      app.MainLoop()
  </code></pre>
  
  <p>On Linux and Windows, the correct items are identified when moused over. On OSX hittest always returns -1 (wx.NOT_FOUND)</p>
  
  <p>I'm running 32-bit wxPython, 2.8.12.1 (mac-unicode) which uses the Carbon API in 32bit python 2.7.2.</p>
  
  <p>I can't find this listed as a known bug in wxWidgets and I'm hesitant to submit as it seems this should work.  The listbox control is deeply integrated into out GUI and I really don't want to swap it out for ListCtrl or something similar as we have all other functionality working now. Does anyone know a workaround?</p>