Factor in opt_queue value into enough work queued or staged.

cgminer.c

@@ -2391,8 +2391,9 @@ static void *get_work_thread(void *userdata)
 
 	if (!ts)
 		lagging = true;
-	else if (((cs || cq >= opt_queue) && ts >= maxq) ||
+	if (((cs >= opt_queue || cq >= opt_queue) && ts >= maxq) ||
-		 ((cs || cq) && tq >= maxq) || clone_available())
+	    ((cs >= opt_queue || cq >= opt_queue) && tq >= maxq) ||
+	    clone_available())
 		goto out;
 
 	ret_work = make_work();