[PropertyAccessor] Allow null value for a array

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12482
| License       | MIT
| Doc PR        | -
@piotrpasich well if you can tell me whats wrong with it please do! Because to my knowledge && and || are left associative (see http://php.net/manual/en/language.operators.precedence.php)