Date interval calculation logic is incorrect

[NingQue0920]

func (d diff) InDays() int { return absFloor(math.Floor(float64(d.InHours()) / 24)) }

this method should return absFloor(float64(d.InHours()) / 24) 。
When the value of float64(d.InHours()) / 24 is negative, math.Floor() will calculate the nearest negative integer but less than float64(d.InHours()) / 24, the absFloor is meaningless