Artificially set the pool lagging flag on work restart to avoid messages about slow pools after every longpoll.

cgminer.c

@@ -2753,8 +2753,13 @@ int restart_wait(unsigned int mstime)
 	
 static void restart_threads(void)
 {
+	struct pool *cp = current_pool();
 	int i;
 
+	/* Artificially set the lagging flag to avoid pool not providing work
+	 * fast enough  messages after every long poll */
+	pool_tset(cp, &cp->lagging);
+
 	/* Discard staged work that is now stale */
 	discard_stale();