MagickRectangle with negative values?

[Gounlaf]

Hi,

I was wondering if MagickRectangle values can be negative.
Since Percentage can be negative (according to tests), I understand with & height can be negative.

But it's kinda weird.

Thanks,

Regards.

[dlemstra]

Yeah that's a good point. I should add some checks for this. I just pushed a patch to add checks for this.