bugfix: fusion lstm and gru batch,seq mode switch

test=develop

Author: tensor-tang

paddle/fluid/operators/fusion_gru_op.cc

@@ -290,12 +290,13 @@ class FusionGRUKernel : public framework::OpKernel<T> {
   void BatchCompute(const framework::ExecutionContext& ctx) const {
     using DeviceContext = paddle::platform::CPUDeviceContext;
     auto* x = ctx.Input<LoDTensor>("X");
+    INIT_BASE_INPUT_OUTPUT
+    INIT_BASE_SIZES
     if (x->lod()[0].size() == 2) {
+      xx->Resize({total_T, D3});
       SeqCompute(ctx);
       return;
     }
-    INIT_BASE_INPUT_OUTPUT
-    INIT_BASE_SIZES
     INIT_VEC_FUNC
 
     auto* reordered_h0 = ctx.Output<Tensor>("ReorderedH0");

paddle/fluid/operators/fusion_lstm_op.cc

@@ -424,11 +424,12 @@ class FuisonLSTMKernel : public framework::OpKernel<T> {
   void BatchCompute(const framework::ExecutionContext& ctx) const {
     using DeviceContext = platform::CPUDeviceContext;
     INIT_BASE_INPUT_OUTPUT
+    INIT_BASE_SIZES
     if (x->lod()[0].size() == 2) {
+      xx->Resize({x_dims[0], D4});
       SeqCompute(ctx);
       return;
     }
-    INIT_BASE_SIZES
     INIT_VEC_FUNC
     INIT_BASE_INPUT_DATAS