Fix bugs of reader.py in ctr model
Fix bugs of reader.py in ctr model

kuke/models,PaddlePaddle/models,xinghai-sun/models,qingqing01/models,xinghai-sun/models,kuke/models,PaddlePaddle/models,Superjom/models-1,kuke/models,qingqing01/models,PaddlePaddle/models,Superjom/models-1,xinghai-sun/models,lcy-seso/models,qingqing01/models,xinghai-sun/models,Superjom/models-1,lcy-seso/models,lcy-seso/models,kuke/models