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Molecular dynamics by NMR data analysis

Brought to you by: edauvergne, troelslinnet

Bug fix for wxPython 2.9.4.0 - the unsetting of the alpha mask for all bitmap images should now work.

The wx.Bitmap.SetMaskColour(None) call does not work, so instead a wx.Colour() instance is passed in
instead.

Authored by: bugman 2012-10-02

changed