SINGA-100 Implement layers using CUDNN for GPU training
SINGA-100 Implement layers using CUDNN for GPU training

fix a bug in stub.cc

wangsheng1001/incubator-singa,apache/incubator-singa,kaiping/incubator-singa,cac2003/incubator-singa,nusdbsystem/incubator-singa,wangsheng1001/incubator-singa,kaiping/incubator-singa,kaiping/incubator-singa,nusdbsystem/incubator-singa,cac2003/incubator-singa,jinyangturbo/incubator-singa,apache/incubator-singa,cac2003/incubator-singa,ijingo/incubator-singa,venkatsatish/incubator-singa,kaiping/incubator-singa,ijingo/incubator-singa,wangsheng1001/incubator-singa,ijingo/incubator-singa,jinyangturbo/incubator-singa,nudles/incubator-singa,venkatsatish/incubator-singa,kaiping/incubator-singa,nusdbsystem/incubator-singa,ijingo/incubator-singa,wangsheng1001/incubator-singa,cac2003/incubator-singa,nudles/incubator-singa,nudles/incubator-singa,nudles/incubator-singa,jinyangturbo/incubator-singa,venkatsatish/incubator-singa,wangsheng1001/incubator-singa,nusdbsystem/incubator-singa,jinyangturbo/incubator-singa,apache/incubator-singa,apache/incubator-singa,ijingo/incubator-singa,nudles/incubator-singa,nusdbsystem/incubator-singa,venkatsatish/incubator-singa,apache/incubator-singa