* add extra argument to BMO_slot_map_to_flag() to filter by vert/edge/face * made BMO_slot_map_* / BMO_slot_buffer_* functions stricter with type checking.
* add extra argument to BMO_slot_map_to_flag() to filter by vert/edge/face * made BMO_slot_map_* / BMO_slot_buffer_* functions stricter with type checking.