fix return value of stop action.

hgdriver/hgdev/hg_scanner.cpp

@@ -4332,7 +4332,7 @@ int hg_scanner::stop(void)
 	{
 		while (is_running() != THREAD_RUNNING_IDLE)
 			std::this_thread::sleep_for(std::chrono::milliseconds(3));
-		ret = status_;
+		//ret = status_;		// the return value is for 'stop' action, but not final statu !!!
 	}
 	VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "user stopped result = %s\n", hg_scanner_err_description(ret));