fseg_free_extent fails to call buf_page_free() for the whole segment

        for (ulint i = 0; i < FSP_EXTENT_SIZE; i++) {

                if (!xdes_is_free(descr, i)) {

                        buf_page_free(

-                         page_id_t(space->id, first_page_in_extent + i),

+                         page_id_t(space->id, first_page_in_extent + 1),

                          mtr, __FILE__, __LINE__);

                }

        }