[xy_grid] made -1 seed fixing apply to Var. seed too

        ys = process_axis(y_opt, y_values)

        def fix_axis_seeds(axis_opt, axis_list):

            if axis_opt.label == 'Seed':

            if axis_opt.label == 'Seed' or 'Var. seed':

                return [int(random.randrange(4294967294)) if val is None or val == '' or val == -1 else val for val in axis_list]

            else:

                return axis_list