#363 UFRaw crashes with zoom >100%

[Alexey Nezhdanov]

Repro:
Click "underexposed" or "overexposed" checkbox so that parts of the image blink.
Then zoom to 200%

Instant crash. Reproduced on standalone version 0.19.2-2ubuntu1

[Frank Markesteijn]

This will fix it:

[Niels Kristian Bech Jensen]

Hi Frank.

Thank you for the patch. I have commited it to the cvs repository.

Regards,
Niels Kristian