title: Empty resultset when using Phalcon\Mvc\Model\Query\Builder
body: <p>Good day, eveyrone!</p>
  
  <p>I'm trying to fetch data from Oracle database via Phalcon\Mvc\Model\Query\Builder, but resultset allways empty.</p>
  
  <pre><code>// APPLICATION_ROOT/app/models/Package.php
  &lt;?php
  
  use Phalcon\MVC\Model;
  
  class Package extends Model
  {
      public function getSource()
      {
          return 'RADIO_PACKAGE';
      }
  }
  </code></pre>
  
  <p>The controller class:</p>
  
  <pre><code>public function indexAction()
  {
      $packages = Package::find();
      var_dump($packages-&gt;toArray()); // null
  
      $query = $this-&gt;modelsManager-&gt;createBuilder()-&gt;from('Package')-&gt;getQuery();
      var_dump($query-&gt;execute()-&gt;toArray()); // null
  
      // But the direct access to database returns rows
      $PDO = $this-&gt;getDI()-&gt;get('db')-&gt;getInternalHandler();
      var_dump($PDO-&gt;query('SELECT * FROM RADIO_PACKAGE')-&gt;fetchAll()); // returns 23 rows
  }
  </code></pre>
  
  <p>Does anyone know what the problem is?</p>
  
  <p>I tried Phalcon 1.1.0 and 1.2.0.</p>
  
  <p>PDO_OCI driver has been installed from PHP 5.4.16 source.</p>
  
  <p>PHP version is 5.4.11.</p>
  
  <p>Oracle version is "Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit"</p>