title: "Semantic error: Redefinition of '__ccContentScaleFactor' with a different type" in Cocos2D v2
body: <p>i have developed a new game and it is running perfectly fine on my real ios devices and even on simulators but when i decided to submit it to AppStore it is giving error on this line.</p>
  
  <pre><code>extern CGFloat  __ccContentScaleFactor;
  </code></pre>
  
  <p>and error is </p>
  
  <pre><code>cocos2d/Platforms/iOS/CCDirectorIOS.h:102:16: Redefinition of '__ccContentScaleFactor' with a different type: 'CGFloat' (aka 'double') vs 'float'
  </code></pre>
  
  <p>can anyone please help me with this issue i just update xcode to 5.1. thanks</p>