UIGraphicsBeginImageContext(targetSize); //instruments show here a leak 128bytes

CGRect thumbnailRect = CGRectZero;

thumbnailRect.origin = thumbnailPoint;
thumbnailRect.size.width  = scaledWidth;
thumbnailRect.size.height = scaledHeight;

[sourceImage drawInRect:thumbnailRect];

newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Hi I'm trying to scale a UIImage so I load it with

[UIImage imageNamed:@"myImage.png"];

and then pass it into a method. In that method I have the code above that resizes my image and at the end of the method I have a

return newImage;

The instruments show me a leak at line

UIGraphicsBeginImageContext(targetSize); //instruments show here a leak 128bytes

What am I doing wrong? Where exactly is the leak?