fix pool_op bug (#7879)
fix pool_op bug (#7879)


baidu/Paddle,PaddlePaddle/Paddle,lcy-seso/Paddle,QiJune/Paddle,reyoung/Paddle,QiJune/Paddle,luotao1/Paddle,putcn/Paddle,putcn/Paddle,jacquesqiao/Paddle,jacquesqiao/Paddle,jacquesqiao/Paddle,putcn/Paddle,pkuyym/Paddle,reyoung/Paddle,tensor-tang/Paddle,jacquesqiao/Paddle,luotao1/Paddle,Canpio/Paddle,tensor-tang/Paddle,QiJune/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle,QiJune/Paddle,lcy-seso/Paddle,baidu/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle,putcn/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,reyoung/Paddle,pkuyym/Paddle,luotao1/Paddle,jacquesqiao/Paddle,baidu/Paddle,baidu/Paddle,putcn/Paddle,QiJune/Paddle,luotao1/Paddle,pkuyym/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,chengduoZH/Paddle,PaddlePaddle/Paddle,baidu/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,pkuyym/Paddle,lcy-seso/Paddle,luotao1/Paddle,putcn/Paddle,chengduoZH/Paddle,reyoung/Paddle,Canpio/Paddle,QiJune/Paddle,chengduoZH/Paddle,pkuyym/Paddle,chengduoZH/Paddle,lcy-seso/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,reyoung/Paddle,tensor-tang/Paddle,Canpio/Paddle,chengduoZH/Paddle,Canpio/Paddle