fix gru gcc7.4 bug for the gru compile

fix gru gcc7.4 bug for the gru compile

paddle/fluid/operators/math/gru_compute.cc

@@ -43,7 +43,7 @@ struct GRUUnitFunctor<platform::CPUDeviceContext, T> {
 
     detail::forward_reset_output(detail::forward::gru_resetOutput<T>(), value,
                                  frame_size, batch_size, active_gate, true,
-                                 &context);
+                                 nullptr);
 
     if (value.prev_out_value) {
       blas.GEMM(false, false, batch_size, frame_size, frame_size, 1,
@@ -54,7 +54,7 @@ struct GRUUnitFunctor<platform::CPUDeviceContext, T> {
 
     detail::forward_final_output(detail::forward::gru_finalOutput<T>(), value,
                                  frame_size, batch_size, active_node,
-                                 origin_mode, &context);
+                                 origin_mode, true, nullptr);
 #endif
   }
 };