memory dc problem in 2.7pre

[Michele Petrazzo]

Hi,
I'm trying the last build (on linux) and I see that there is a problem
on wxMemory dc:

import wx

class MyFrame(wx.Frame):
     def __init__(self,parent, *args, **kw):
         super(MyFrame, self).__init__(parent, *args, **kw)
         wx.FutureCall(2000, self._createMD)

     def _createMD(self):
         print "OK"
         dc = wx.MemoryDC()
         dc.BeginDrawing()
         dc.SetUserScale(1.0,1.0)
         dc.SetBackground(wx.WHITE_BRUSH)

if __name__ == '__main__':
     app = wx.PySimpleApp()
     f = MyFrame(None)
     f.Show()
     app.MainLoop()

   File "MyFrame.py", line 15, in _createMD
     dc.SetBackground(wx.WHITE_BRUSH)
   File
"/usr/lib/python2.4/site-packages/wx-2.7.0-gtk2-unicode/wx/_gdi.py",
line 3125, in SetBackground
     return _gdi_.DC_SetBackground(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "Ok()" failed at
../src/gtk/dcclient.cpp(2041) in SetBackground(): invalid window dc

Michele