MT#55524 fix typo

We want to disable thread cancellation here, not enable.

Change-Id: Ib0dd80c15af1e38252617d7cdaa1880f6c63485e
(cherry picked from commit 5188f24bec)

daemon/poller.c

@@ -587,7 +587,7 @@ void poller_timer_loop(void *d) {
 
 		pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
 		usleep(sleeptime);
-		pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+		pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
 
 		continue;