title: cannot convert value of type "inout CGAffineTransform" to expected argument
body: <p>I am trying to make the player change of direction while is in a path, the problem is that every time I run the app it pop out an error of "cannot convert value of type "inout CGAffineTransform" to expected argument..."</p>
  
  <pre><code> override func touchesBegan(touches: Set&lt;UITouch&gt;, withEvent event: UIEvent?) {
     /* Called when a touch begins */
  
      if gameStarted == false {
  
          gameStarted = true
          moveClockWise()
          movingClockWise = true
  
  
          var myCircle : CGMutablePath! = CGPathCreateMutable()
          let newDx = player.position.x - self.frame.width / 2
          let newDy = player.position.y - self.frame.height / 2
          let newRad = atan2(newDy, newDx)
          let newPath = UIBezierPath(arcCenter: CGPoint(x:self.frame.width / 2, y: self.frame.height / 2) , radius: 170, startAngle: newRad, endAngle: newRad + CGFloat(M_PI * 4), clockwise: true)
  
          var mirroring = CGAffineTransformMakeScale(1.0, -1.0) // flip horizontal
          var mirrorPath : CGMutablePath! = CGPathCreateMutable()
          let finalPath = withUnsafeMutablePointer(&amp;mirroring)//Here it tells me the error
          {
              CGPathAddPath(mirrorPath, UnsafeMutablePointer($0), newPath.CGPath!)
          }
  
          let newFollow = SKAction.followPath(mirrorPath, asOffset: false, orientToPath: true, speed: 200)
          player.runAction(SKAction.repeatActionForever(newFollow).reversedAction(),withKey:"followPath")
  
  
     }else  {
          player.removeActionForKey("followPath")
      }
  
         }
  
  func moveClockWise(){
  
      let dx = player.position.x - self.frame.width / 2
      let dy = player.position.y - self.frame.height / 2
  
      let rad = atan2(dy, dx)
  
      path = UIBezierPath(arcCenter: CGPoint(x:self.frame.width / 2, y: self.frame.height / 2) , radius: 170, startAngle: rad, endAngle: rad + CGFloat(M_PI * 4), clockwise: true)
  
      let follow = SKAction.followPath(path.CGPath, asOffset: false, orientToPath: true, speed: 200)
      player.runAction(SKAction.repeatActionForever(follow).reversedAction(),withKey:"followPath")
  
  }
  </code></pre>