fix a buggy typo

src/brpc/policy/thrift_protocol.cpp

@@ -232,8 +232,8 @@ void ThriftClosure::DoRun() {
         span->set_start_send_us(butil::cpuwide_time_us());
     }
     Socket* sock = accessor.get_sending_socket();
-    MethodStatus* method_status = server->options().thrift_service ? 
-        server->options().thrift_service->_status : NULL,
+    MethodStatus* method_status = (server->options().thrift_service ? 
+        server->options().thrift_service->_status : NULL);
     ConcurrencyRemover concurrency_remover(method_status, &_controller, _received_us);
     if (!method_status) {
         // Judge errors belongings.

src/brpc/server.cpp

@@ -273,7 +273,6 @@ void* Server::UpdateDerivedVars(void* arg) {
     std::vector<SocketId> internal_conns;
     
     server->_nerror_bvar.expose_as(prefix, "error");
-    //server->_nrefused_bvar.expose_as(prefix, "refused");
 
     bvar::PassiveStatus<timeval> uptime_st(
         prefix, "uptime", GetUptime, (void*)(intptr_t)start_us);