title: "No previous prototype for function" warning
body: <p>i use shareKit to myself program .</p>
  
  <p>but in the FBConnectGlobal, there are some warning,</p>
  
  <pre><code>NSMutableArray* FBCreateNonRetainingArray() {
    CFArrayCallBacks callbacks = kCFTypeArrayCallBacks;
    callbacks.retain = RetainNoOp;
    callbacks.release = ReleaseNoOp;
    return (NSMutableArray*)CFArrayCreateMutable(nil, 0, &amp;callbacks);
  }
  </code></pre>
  
  <p>like this method, it warning:"No previous prototype for function FBCreateNonRetainingArray"</p>