Simplify the enough work algorithm dramatically.

cgminer.c

@@ -2408,9 +2408,13 @@ static void *get_work_thread(void *userdata)
 	ts = __total_staged();
 	mutex_unlock(stgd_lock);
 
-	if (((cs >= opt_queue || cq >= opt_queue) && ts >= maxq) ||
-	    ((cs >= opt_queue || cq >= opt_queue) && tq >= maxq && ((cq < maxq && !opt_fail_only) || opt_fail_only)) ||
-	    clone_available())
+	if (ts >= maxq)
+		goto out;
+
+	if (ts >= opt_queue && tq >= maxq)
+		goto out;
+
+	if (clone_available())
 		goto out;
 
 	ret_work = make_work();