img_options width/height settings not taking effect

[davidw]

In my code I have

    img_options[:width] = 20
    img_options[:height] = 20

But the image always comes out the same size even if I change those settings.

[davidw]

Only thing I can see that's different is that the axslx version uses a oneCellAnchor whereas libxlsxwriter uses a twoCellAnchor.