py: Code clean-up in native emitter; improve thumb native calls.

py/runtime.c

@@ -1192,13 +1192,14 @@ NORETURN void mp_native_raise(mp_obj_t o) {
     nlr_raise(mp_make_raise_obj(o));
 }
 
-// these must correspond to the respective enum
+// these must correspond to the respective enum in runtime0.h
 void *const mp_fun_table[MP_F_NUMBER_OF] = {
     mp_convert_obj_to_native,
     mp_convert_native_to_obj,
     mp_load_const_int,
     mp_load_const_dec,
     mp_load_const_str,
+    mp_load_const_bytes,
     mp_load_name,
     mp_load_global,
     mp_load_build_class,
@@ -1225,6 +1226,8 @@ void *const mp_fun_table[MP_F_NUMBER_OF] = {
     mp_call_method_n_kw,
     mp_getiter,
     mp_iternext,
+    nlr_push,
+    nlr_pop,
     mp_native_raise,
     mp_import_name,
     mp_import_from,