Assert in wxBitmapComboBox

[ABX]

Hi (Jaakko)!

1. launch widgets sample
2. select BitmapCombobox page in tree on the left
3. click on "Add widget icons" button - combo box is filled now
4. click on "Set image from file"
5. in wxFileDialog select samples/splash/splash.png
6. assert message:

    ..\..\src\generic\bmpcboxg.cpp(162): assert "n < m_bimtaps.size()" failed 
    in void wxBitmapComboBox::SetItemBitmap( unsigned, wxBitmap const & )():
    invalid item index

Tried with OpenWatcom Unicode build.

ABX