Make configuration-extensions have a default value

This saves a check (and an indentation) in the deployment plugin,
making the code a tiny bit simpler.

Suggested-By: Sam Thursfield

1 files changed, 2 insertions, 1 deletions

diff --git a/morphlib/morph2.py b/morphlib/morph2.py
index 3a3ad679..6e24765e 100644
--- a/morphlib/morph2.py
+++ b/morphlib/morph2.py
@@ -49,7 +49,8 @@ class Morphology(object):
             ('strata', []),
             ('description', ''),
             ('arch', None),
-            ('system-kind', None)
+            ('system-kind', None),
+            ('configuration-extensions', []),
         ]
     }