title: UITableView doesn't fill custom cells inside of UITabBarController
body: <p>I have UITabBarController and on one of the tabs I have UIViewController with UITableView inside.</p>
  
  <p>I had created custom cell class.</p>
  
  <p>If I fill tableView custom cells without UITabBarController (I put entry point to UIViewController) everything works fine, but if I use UITabBarController firstly, my cells are not populated with any data when I reach UITableView tab.
  Where could be a bug here?</p>
  
  <pre><code>import UIKit
  
  class blaViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
  
      @IBOutlet weak var tableView: UITableView!
      override func viewDidLoad() {
          super.viewDidLoad()
  
          // Do any additional setup after loading the view.
      }
  
      override func didReceiveMemoryWarning() {
          super.didReceiveMemoryWarning()
          // Dispose of any resources that can be recreated.
      }
  
  
      func tableView(tableView:UITableView, numberOfRowsInSection section:Int) -&gt; Int {
          return 3
      }
  
      func tableView(tableView:UITableView, cellForRowAtIndexPath indexPath:NSIndexPath) -&gt; UITableViewCell {
          let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! blaTableViewCell
          cell.myLabel.text = "123"
          return cell
      }
  }
  
  import UIKit
  
  class blaTableViewCell: UITableViewCell {
  
      @IBOutlet weak var myLabel: UILabel!
      override func awakeFromNib() {
          super.awakeFromNib()
          // Initialization code
      }
  
      override func setSelected(selected: Bool, animated: Bool) {
          super.setSelected(selected, animated: animated)
  
          // Configure the view for the selected state
      }
  
  }
  </code></pre>