[dvd::rip] Internal exception when adjusting preview boundary

[Josh <pekster-main@xxxxxxx>]

When I click on the 3rd (rightmost) image of the Clip & Zoom tab to manipulate the borders by dragging them around, an internal exception is caused when I drag the bottom bar around.  It seems to occur when the bottom bar is dragged below the border of the image, although It's a bit hard to tell exactly where this point is (at the border, 1 pixel beyond the border, I'm just not 100% sure.)  I get about 24 pop-up windows that read:

An internal exception was thrown!
The error message was:

Illegal division by zero at /usr/lib/perl5/vendor_perl/5.8.8/Video/DVDRip/Title.pm line 944.

Further, if I save the project after this state and re-open it, the messages re-appear right after opening the project.  I can usually rescue it by finding the bottom bar and dragging it back into the body of the image preview, and then after closing the error windows it seems to operate normally again.

-- 
Josh

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