Minor tweak of NumberPicker to draw the scroll wheel at the right locaion

    private void initializeScrollWheel() {

        if (mInitialScrollOffset != Integer.MIN_VALUE) {

            return;

        }

        int[] selectorIndices = getSelectorIndices();

        int totalTextHeight = selectorIndices.length * mTextSize;

        float totalTextGapHeight = (mBottom - mTop) - totalTextHeight;

        float textGapCount = selectorIndices.length - 1;

        int selectorTextGapHeight = (int) (totalTextGapHeight / textGapCount + 0.5f);

        // Compensate if text size is odd since every time we get its middle a pixel is lost.

        mInitialScrollOffset = mCurrentScrollOffset = mTextSize - (3 * (mTextSize % 2));

        mSelectorElementHeight = mTextSize + selectorTextGapHeight;

        mInitialScrollOffset = mTextSize - 3 * (mSelectorElementHeight % 2);

        mCurrentScrollOffset = mInitialScrollOffset;

        updateInputTextView();

    }