TT#14008 suppress stray redis log warnings

Change-Id: Ice39f3e7ccfaae235db83d0839351c20369bbd6e

daemon/poller.c

@@ -526,7 +526,10 @@ void poller_timer_loop(void *d) {
 
 now:
 		gettimeofday(&rtpe_now, NULL);
-		if (rtpe_redis_write && (rtpe_redis_write->async_last + rtpe_config.redis_delete_async_interval <= rtpe_now.tv_sec)) {
+		if (rtpe_redis_write && rtpe_redis_write->async_ev &&
+				(rtpe_redis_write->async_last + rtpe_config.redis_delete_async_interval
+				 <= rtpe_now.tv_sec))
+		{
 			redis_async_event_base_action(rtpe_redis_write, EVENT_BASE_LOOPBREAK);
 			rtpe_redis_write->async_last = rtpe_now.tv_sec;
 		}