Get left foot bottom height.

	void LateUpdate()
	{
		if(animator)
		{
			Vector3 leftFootT = animator.GetIKPosition(AvatarIKGoal.LeftFoot);
			Quaternion leftFootQ = animator.GetIKRotation(AvatarIKGoal.LeftFoot);
			
			Vector3 leftFootH = new Vector3(0, -animator.leftFeetBottomHeight, 0);
			
			Vector3 pos = leftFootT + leftFootQ * leftFootH;
			Debug.Log(pos);
		}
	}