[scribus] patching getImageScale()

[José Antonio Rocha]

2011/2/16 a.l.e <ale.comp_06 at xox.ch>

>
> this means that scaleImage() is probably also "broken" and should be fixed
> the same way as getImageScale() is.
>

This is true.

I do some Dexter's Lab jobs here, and find why scaleImage() is deprecated:
it scale at 72-points-base.

getImageScale() works in the same manner. If a image is at 72 DPI,
getImageScale() will return (1.0, 1.0).
If a image is at 144 DPI, will return (0.5, 0.5), and so on.

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