Potential wrong scale due to comparison of float value

[skyline75489]

The comparison here is potentially wrong:

if (self.scalingImageView.zoomScale >= self.scalingImageView.maximumZoomScale) {
    newZoomScale = self.scalingImageView.minimumZoomScale;
}

In fact, I've just encountered this problem. I've changed this into:

if (self.scalingImageView.zoomScale >= self.scalingImageView.maximumZoomScale || 
ABS(self.scalingImageView.zoomScale - self.scalingImageView.maximumZoomScale) <= FLT_EPSILON) {
    newZoomScale = self.scalingImageView.minimumZoomScale;
}