Update classes/Base/DB/ResultSet.php

[leandrocanabarro]

PROBLEM

• not checks if the current iterator position is valid

EXAMPLE

SELECT * FROM foo WHERE foo_id = '';

OR

SELECT * FROM foo WHERE foo_id = 0;

SOLUTION

• return NULL, if the current iterator position not is valid

line 165 - modify for

public function current() { return $this->valid() ? $this->records[$this->position] : NULL; }