fix LSTM sampler
fix LSTM sampler

yajiedesign/mxnet,reminisce/mxnet,reminisce/mxnet,larroy/mxnet,sxjscience/mxnet,sxjscience/mxnet,mbaijal/incubator-mxnet,dmlc/mxnet,tlby/mxnet,reminisce/mxnet,larroy/mxnet,leezu/mxnet,zhreshold/mxnet,szha/mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,tlby/mxnet,ptrendx/mxnet,DickJC123/mxnet,larroy/mxnet,dmlc/mxnet,leezu/mxnet,mbaijal/incubator-mxnet,reminisce/mxnet,ptrendx/mxnet,reminisce/mxnet,ptrendx/mxnet,larroy/mxnet,apache/incubator-mxnet,reminisce/mxnet,zhreshold/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,ptrendx/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,szha/mxnet,tlby/mxnet,apache/incubator-mxnet,tlby/mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,larroy/mxnet,mbaijal/incubator-mxnet,leezu/mxnet,dmlc/mxnet,leezu/mxnet,sxjscience/mxnet,yajiedesign/mxnet,leezu/mxnet,larroy/mxnet,mbaijal/incubator-mxnet,dmlc/mxnet,mbaijal/incubator-mxnet,ForkedReposBak/mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,zhreshold/mxnet,szha/mxnet,szha/mxnet,leezu/mxnet,zhreshold/mxnet,tlby/mxnet,zhreshold/mxnet,DickJC123/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,tlby/mxnet,yajiedesign/mxnet,dmlc/mxnet,tlby/mxnet,reminisce/mxnet,ptrendx/mxnet,zhreshold/mxnet,JuliaPackageMirrors/MXNet.jl,ForkedReposBak/mxnet,yajiedesign/mxnet,sxjscience/mxnet,DickJC123/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,szha/mxnet,BigEpsilon/MXNet.jl,leezu/mxnet,tlby/mxnet,sxjscience/mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,szha/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,szha/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,ptrendx/mxnet,DickJC123/mxnet,sxjscience/mxnet,ForkedReposBak/mxnet,eric-haibin-lin/mxnet,ptrendx/mxnet,tlby/mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,leezu/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,szha/mxnet,reminisce/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,ptrendx/mxnet,leezu/mxnet,reminisce/mxnet,apache/incubator-mxnet,szha/mxnet,ptrendx/mxnet,sxjscience/mxnet,sxjscience/mxnet,reminisce/mxnet,mbaijal/incubator-mxnet,tlby/mxnet,apache/incubator-mxnet,dmlc/mxnet,dmlc/mxnet,larroy/mxnet,zhreshold/mxnet,zhreshold/mxnet