StickChart等chartY坐标在右侧时selectedindex计算有误

[limccn]

StickChart等chartY坐标在右侧时selectedindex计算有误， 应当返回 stickData.size() - maxSticksNum + index 实际返回 index

需要增加以下判断 if (axisYPosition == AXIS_Y_POSITION_LEFT) { return index; }else{ return stickData.size() - maxSticksNum + index; }