[py3] Avoided comparison with None value in formsets

            total_forms = initial_forms + self.extra

            # Allow all existing related objects/inlines to be displayed,

            # but don't allow extra beyond max_num.

            if self.max_num is not None:

                if initial_forms > self.max_num >= 0:

                    total_forms = initial_forms

                elif total_forms > self.max_num >= 0:

        else:

            # Use the length of the inital data if it's there, 0 otherwise.

            initial_forms = self.initial and len(self.initial) or 0

            if initial_forms > self.max_num >= 0:

            if self.max_num is not None and (initial_forms > self.max_num >= 0):

                initial_forms = self.max_num

        return initial_forms