title: Stroking not working on CCLabelTTF in cocos2d-x ios in c++
body: <p>I am tryng to make an outline of green color in my label but its not working.. 
  my code is</p>
  
  <pre><code>CCLabelTTF* pLabel = CCLabelTTF::create("Hello World", "HoboStd", 50);
  pLabel-&gt;setPosition(ccp(200,200));
  pLabel-&gt;enableStroke(ccGREEN, 5.0,true);
  this-&gt;addChild(pLabel);
  </code></pre>
  
  <p>Its not providing the outline around the label text Hello World.Any one here who can help me</p>