Made enable override indicator count for infinite loop viewpager.

[jaeho]

I needed to adjust item count for infinite loop ViewPager. Because the ViewPager has items as Integer.MAX_VALUE.

[jaeho]

It will be used like this::

class InfiniteCircleIndicator : CircleIndicator {

    constructor(context: Context?) : super(context)
    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs)
    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int, defStyleRes: Int) : super(context, attrs, defStyleAttr, defStyleRes)

    override fun getCount(viewPager: ViewPager?): Int {
        return if (viewPager?.adapter is CustomPagerAdapter<*>) {
            (viewPager.adapter as CustomPagerAdapter<*>).realCount()
        } else
            super.getCount(viewPager)
    }

    override fun getCurrentPosition(viewPager: ViewPager?, position: Int): Int {
        return if (viewPager?.adapter is CustomPagerAdapter<*>) {
            position % (viewPager.adapter as CustomPagerAdapter<*>).realCount()
        } else
            super.getCurrentPosition(viewPager, position)
    }
}