Update minimal_data_sharing/minimal_lock_free_queue_logging.cpp

Co-authored-by: Shuhao Wu <shuhao@shuhaowu.com>

Author: carlossvg

minimal_data_sharing/minimal_lock_free_queue_logging.cpp

@@ -58,11 +58,10 @@ class MinimalSubscriber : public rclcpp::Node
     logger_thread_ = std::thread(
       [this]() {
         while (rclcpp::ok()) {
-          auto log_msg = logger_queue_.pop();
-          while (log_msg.has_value()) {
+          do {
+            auto log_msg = logger_queue_.pop();
             log_message(log_msg.value());
-            log_msg = logger_queue_.pop();
-          }
+          } while (log_msg.has_value());
           rclcpp::sleep_for(100ms);
         }
       }