Desired image size are not respected

[stefat77]

Sometimes the call
out = diagonal_crop.crop(im, base, angle, height, width)
returns an output image with a slightly different size than the desired one (height, width).

e.g.
desired (height, width) = (256,256)
cropped image size = (257,256) or (257,257) or (255,255)

[jobevers]

Thanks. I'll take a look at this.