py: Make arg to MP_BC_RAISE_VARARGS a byte.

py/bc0.h

@@ -81,7 +81,7 @@
 #define MP_BC_UNPACK_EX          (0x7a) // uint
 
 #define MP_BC_RETURN_VALUE       (0x80)
-#define MP_BC_RAISE_VARARGS      (0x81) // uint
+#define MP_BC_RAISE_VARARGS      (0x81) // byte
 #define MP_BC_YIELD_VALUE        (0x82)
 #define MP_BC_YIELD_FROM         (0x83)
 

py/emitbc.c

@@ -672,9 +672,9 @@ static void emit_bc_return_value(emit_t *emit) {
 }
 
 static void emit_bc_raise_varargs(emit_t *emit, int n_args) {
-    assert(n_args >= 0);
+    assert(0 <= n_args && n_args <= 2);
     emit_pre(emit, -n_args);
-    emit_write_byte_1_uint(emit, MP_BC_RAISE_VARARGS, n_args);
+    emit_write_byte_1_byte(emit, MP_BC_RAISE_VARARGS, n_args);
 }
 
 static void emit_bc_yield_value(emit_t *emit) {

py/vm.c

@@ -479,7 +479,6 @@ bool mp_execute_byte_code_2(const byte **ip_in_out, mp_obj_t *fastn, mp_obj_t **
                         assert(unum == 1);
                         obj1 = POP();
                         nlr_jump(obj1);
-                        return false;
 
                     case MP_BC_YIELD_VALUE:
                         nlr_pop();