Initializer lists can set subclass properties

[nex3]

In the following code, when "this.foo" is set to "val" in Foo, it should never call a subclass's "set foo" property. However, it does, and incorrectly prints "setting foo to 1".

class Foo {
  var foo;

  Foo(val) : this.foo = val;
}

class Foo2 extends Foo {
  Foo2(val): super(val);

  set foo(val) {
    print('setting foo to $val');
  }
}

main() {
  new Foo2(1);
}

[nex3]

This is fixed by r1489.

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Added Fixed label.