Fixed a typo in r9650.

        if isinstance(f, varchar_fields) and f.max_length > 255:

            if db_version < (5, 0, 3):

                msg = '"%(name)s": %(cls)s cannot have a "max_length" greater than 255 when you are using a version of MySQL prior to 5.0.3 (you are using %(version)s).'

            if f.unique == True:

            elif f.unique == True:

                msg = '"%(name)s": %(cls)s cannot have a "max_length" greater than 255 when using "unique=True".'

            else:

                msg = None