bug: add punch_through_list to IML6NRM

src/main.cpp

@@ -108,6 +108,7 @@ void main()
 
   system.IML6NRM = istnrm::end_of_render_tsp
                  | istnrm::v_blank_in
+                 | istnrm::end_of_transferring_punch_through_list
                  | istnrm::end_of_transferring_opaque_list;
 
   system.IML4EXT = istext::aica;