Output error while cut file more than once .

[FFengIll]

It failed while we cut one file again.

pdf2 = cut(pdf1)
pdf3 = edit(pdf2)
pdf4 = cut(pdf3)
# now pdf4 is wrong!

[FFengIll]

Fixed in
debb1c3

We have an error calc of x,y which ignored the compare with original box.