Get rid of non ascii character in source file.

Get rid of non ascii character in source file.

There was a ß in utils.py that I think was supposed to be a 0.  Either it needs
to be changed to a 0 or the character encoding needs to be declared at the top
of the source file.  I opted to change the character to a 0.

Signed-off-by: Mike O'Connor <stew@vireo.org>