From e1235674abdd5cf891f169e30683fddbfcb87af1 Mon Sep 17 00:00:00 2001
From: Elie Roux <elie.roux@telecom-bretagne.eu>
Date: Tue, 9 Apr 2013 18:31:29 +0200
Subject: Fixing bug by making optional argument optional

---
 luatexbase-modutils.dtx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/luatexbase-modutils.dtx b/luatexbase-modutils.dtx
index 2dce051..1e511d5 100644
--- a/luatexbase-modutils.dtx
+++ b/luatexbase-modutils.dtx
@@ -552,7 +552,7 @@ function require_module(name, req_date)
     local info = modules[name]
     if not info then
         warn("module '%s' was not properly identified", name)
-    elseif info.version then
+    elseif req_date and info.version then
         if not (info.date and date_to_int(info.date) > date_to_int(req_date))
         then
             warn("module '%s' required in version '%s'\n"
-- 
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