title: TextField is returning nil when it is empty
body: <p>I am preparing my app to iOS7 and have a weird problem:</p>
  
  <p>When I am trying to get an empty TextField text I get "nil", while in the past it used to return @"" (empty string).</p>
  
  <p>Is that a formal change or bug ?</p>
  
  <p>Thanks
  Shani</p>