title: interval update debug of uknown interval
body: <p>I've got the basic engine of a game put together rather nicely, my issue at the moment is that while running it from my computer onto my iPhone, I'm getting a strange debug message:</p>
  
  <pre><code>CCScheduler#scheduleSelector. Selector already scheduled. Updating interval from: 0.0000 to 0.0000
  </code></pre>
  
  <p>This debug message is being displayed every frame or nearly every frame</p>
  
  <p>Now, I don't have any scheduled updates that are on interval 0, so this makes me think that it must be the generic <code>scheduleUpdate</code> command. I did a search entire project to see if any class had multiple <code>scheduleUpdate</code>s and none do so now I am confused. Any thoughts?</p>