update return type of operator?=() in geometry/Point.h
update return type of operator?=() in geometry/Point.h

cuhkshenzhen/CUHKSZLib,cuhkshenzhen/CUHKSZLib,cuhkshenzhen/CUHKSZLib,alesiong/CUHKSZLib,alesiong/CUHKSZLib,Yexiaoxing/CUHKSZLib,Yexiaoxing/CUHKSZLib,alesiong/CUHKSZLib,Yexiaoxing/CUHKSZLib