Fix assertion in full codegen for holed 'this'.

test/mjsunit/harmony/regress/regress-455141.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-
+//
+// Flags: --experimental-classes --no-lazy
 "use strict";
-function f() {
-  for (let v; v; ) {
-    let x;
+class Base {
+}
+class Subclass extends Base {
+  constructor() {
+      this.prp1 = 3;
   }
 }
-
-f();
+function __f_1(){
+}