Copter: suppressing comment for switch case fall through

ArduCopter/GCS_Mavlink.cpp

@@ -1691,7 +1691,7 @@ void GCS_MAVLINK::handleMessage(mavlink_message_t* msg)
     case MAVLINK_MSG_ID_LOG_REQUEST_DATA:
     case MAVLINK_MSG_ID_LOG_ERASE:
         copter.in_log_download = true;
-        // fallthru
+        /* no break */
     case MAVLINK_MSG_ID_LOG_REQUEST_LIST:
         if (!copter.in_mavlink_delay && !copter.motors.armed()) {
             handle_log_message(msg, copter.DataFlash);