title: Converting Cocos2d code to ARC issues
body: <p>I am trying to ARC enable a project and I am having a few issues when selecting files for ARC.</p>
  
  <p>In the Ball class, the following line,</p>
  
  <pre><code>ballBody-&gt;SetUserData(self);
  </code></pre>
  
  <p>gives the error,</p>
  
  <pre><code>Cannot initialize a parameter of type 'void *' with an Ivalue of type 'Ball *const__strong'
  </code></pre>
  
  <p>In the Enemy.mm class, the following line,</p>
  
  <pre><code>enemyBody-&gt;SetUserData(enemySprite);
  </code></pre>
  
  <p>gives the error,</p>
  
  <pre><code>Cannot initialize a parameter of type 'void *' with an Ivalue of type 'CCPhysicsSprite*__strong'
  </code></pre>
  
  <p>In Enemy.h I have defined the above as:</p>
  
  <pre><code>b2Body* enemyBody;
  CCPhysicsSprite* enemySprite; (in Enemy.m)
  </code></pre>
  
  <p>How can I solve these issues?</p>