Update AMScrollingNavbarViewController.m

line 236:
	// if do not use delta * 2, sometimes the blank area will comes out blow the webview.
	// so there are 2 options:
	// option 1
	//frame = self.scrollableView.layer.frame;
	//frame.size.height += delta * 2;
	//self.scrollableView.layer.frame = frame;
	// option 2
    	frame = self.scrollableView.frame;
    	frame.size.height += delta;
    	self.scrollableView.frame = frame;