What steps will reproduce the problem? 1. create photo size 2. set height to 0 3. enable "crop to fit"

What is the expected output? What do you see instead? i get an exception: tile cannot extend outside image because the 0-height gets passed on to PIL. photologue should handle this situation gracefully, even if "crop to fit" with height=0 doesn't make much sense..

What version of the product are you using? On what operating system? revision 354, debian linux, PIL 1.1.6

Please provide any additional information below.

PhotoSize will now throw a ValueError on save if crop=True and width and height are zero.