title: Unsequenced modification and access to parameter
body: <p>I'm using open source project (<a href="https://github.com/NachoSoto/NSBKeyframeAnimation">NSBKeyframeAnimation</a>) for some of animations in my p    roject. Here are example of methods that i'm using: </p>
  
  <pre><code>double NSBKeyframeAnimationFunctionEaseInQuad(double t,double b, double c, double d)
  {
      return c*(t/=d)*t + b;
  }
  </code></pre>
  
  <p>I have updated my Xcode to 5.0, and every method from this project started to show me warnings like this: <strong><em>"Unsequenced modification and access to 't' "</em></strong>. Should i rewrite all methods to objective-c or there's another approach to get rid of all these warnings?</p>