app_queue: Only send QueueMemberStatus if status changes.

If a queue member was updated with the same status multiple
times each time a QueueMemberStatus event would be sent
which would be a duplicate of the previous.

This change makes it so that the QueueMemberStatus event is
only sent if the status actually changes.

ASTERISK-29355

Change-Id: I580c60d992a0a8f2bea8b91c868771b3b490d116

apps/app_queue.c

@@ -2460,9 +2460,9 @@ static void update_status(struct call_queue *q, struct member *m, const int stat
 		 * happen when there is latency in the connection to the member.
 		 */
 		pending_members_remove(m);
-	}
 
-	queue_publish_member_blob(queue_member_status_type(), queue_member_blob_create(q, m));
+		queue_publish_member_blob(queue_member_status_type(), queue_member_blob_create(q, m));
+	}
 }
 
 /*!