From 7eef3d538bb652d26cf99d35f307cd22581ea393 Mon Sep 17 00:00:00 2001
From: Ted Yin <ted.sybil@gmail.com>
Date: Wed, 7 Aug 2013 09:54:49 +0800
Subject: a little fix

---
 builtin.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/builtin.cpp b/builtin.cpp
index b1d2a93..e5eb988 100644
--- a/builtin.cpp
+++ b/builtin.cpp
@@ -727,6 +727,7 @@ BUILTIN_PROC_DEF(make_list) {
 }
 
 BUILTIN_PROC_DEF(num_add) {
+    ARGS_AT_LEAST_ONE;
     NumObj *res = new IntNumObj(0), *opr; // the most accurate type
     EvalObj *nptr;
     Cons *ptr;
@@ -782,6 +783,7 @@ BUILTIN_PROC_DEF(num_sub) {
 }
 
 BUILTIN_PROC_DEF(num_multi) {
+    ARGS_AT_LEAST_ONE;
     NumObj *res = new IntNumObj(1), *opr; // the most accurate type
     EvalObj *nptr;
     Cons *ptr;
-- 
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