Minor bug in validation of ajax 'page' parameter

[crawley]

I noticed this in select2/Select2View.py

            try:
                page = int(page)
            except TypeError:
                raise InvalidParameter("Invalid page '%s' passed")
            else:
                if page < 1:
                    raise InvalidParameter("Invalid page '%s' passed")

The value of page needs to be interpolated into both exception messages.