fix pageControl is not round (#42)

Author: HooJY

CHIPageControl/CHIPageControlAji.swift

@@ -60,8 +60,8 @@ open class CHIPageControlAji: CHIBasePageControl {
         super.layoutSubviews()
 
         let floatCount = CGFloat(inactive.count)
-        let x = (self.bounds.size.width - self.diameter*floatCount - self.padding*(floatCount-1))*0.5
-        let y = (self.bounds.size.height - self.diameter)*0.5
+        let x = ceil((self.bounds.size.width - self.diameter*floatCount - self.padding*(floatCount-1))*0.5)
+        let y = ceil((self.bounds.size.height - self.diameter)*0.5)
         var frame = CGRect(x: x, y: y, width: self.diameter, height: self.diameter)
 
         active.cornerRadius = self.radius