Chop function does nothing when either width or height is 0 or None

[begna112]

The Wand Chop function seems to do nothing when either width or height is 0 or None. however, even a single plixel instead of 0 will have the intended result on the other dimension.

>>> img = original.clone()
>>> img.size
(4050, 4860)
>>> img.chop(height=0,width=500,gravity="west")
True
>>> img.size
(4050, 4860)
>>> img.chop(height=1,width=500,gravity="west")
True
>>> img.size
(3550, 4859)

The documentation for Chop specifically uses cases of 0 width/height chops to remove a single side and I've verified that works as intended. https://imagemagick.org/Usage/crop/#chop

Intended behavior would be

>>> img = original.clone()
>>> img.size
(4050, 4860)
>>> img.chop(height=0,width=500,gravity="west")
True
>>> img.size
(3550, 4860)

[emcconville]

Thanks for reporting this. Should be a quick fix.

[emcconville]

Seems to work as expected with 1e31167 patch. Feel free to checkout master branch & test.