From c95469073a81d52c37357f8ae42231e2c1a87770 Mon Sep 17 00:00:00 2001
From: Jerome Lebleu <jerome.lebleu@mailoo.org>
Date: Mon, 24 Mar 2014 15:52:26 +0100
Subject: [PATCH] Fix extra parameters absence

---
 src/moulinette/actionsmap.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/moulinette/actionsmap.py b/src/moulinette/actionsmap.py
index fb54e3e3..1935a34d 100644
--- a/src/moulinette/actionsmap.py
+++ b/src/moulinette/actionsmap.py
@@ -1061,7 +1061,8 @@ class ActionsMap(object):
                 arg = parser.add_argument(*names, **argp)
                 if extra:
                     extras[arg.dest] = _get_extra(arg.dest, extra)
-            parser.set_defaults(_extra=extras)
+            if extras:
+                parser.set_defaults(_extra=extras)
 
         # Instantiate parser
         top_parser = self._parser_class()