title: Difference in setting iOS camera default configuration using setExposurePointOfInterest
body: <p>I am trying to set my camera exposure settings to default configuration using
  <code>setExposurePointOfInterest:CGPointMake(0.5, 0.5)</code>
  Is this different from 
  <code>setExposurePointOfInterest:CGPointMake(0.5f, 0.5f)</code></p>
  
  <p>If I use the CGPoint without float, will it cause change in the auto exposure behaviour?</p>