[Image-SIG] misleading error when using negative floats

[Florian Ludwig]

Hi,

img.paste accepts positive floats with an deprecation warning but not
negative floats. The following exception is thrown:
  File "/usr/lib/python2.6/dist-packages/PIL/Image.py", line 1101, in
paste
    self.im.paste(im, box, mask.im)
ValueError: images do not match

I got two wishes :)

 - be more consistent
   (for example working negative floats with a deprecation warning?)

 - throw a more descriptive error

It cost me some hours as I was investigating in the wrong direction as I
thought the image was wrong, not the positioning.

Thank you,
 Florian


-- 
Florian Ludwig <dino at phidev.org>
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