From 5df61a4155018da311f4b70c1ca92cc1ea6dc402 Mon Sep 17 00:00:00 2001
From: Corey Bryant <corey.bryant@canonical.com>
Date: Wed, 24 Jun 2015 19:06:12 +0000
Subject: [PATCH] Sync charm-helpers

---
 hooks/charmhelpers/contrib/python/packages.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hooks/charmhelpers/contrib/python/packages.py b/hooks/charmhelpers/contrib/python/packages.py
index 07b0c1d7..10b32e33 100644
--- a/hooks/charmhelpers/contrib/python/packages.py
+++ b/hooks/charmhelpers/contrib/python/packages.py
@@ -36,6 +36,8 @@ __author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
 def parse_options(given, available):
     """Given a set of options, check if available"""
     for key, value in sorted(given.items()):
+        if not value:
+            continue
         if key in available:
             yield "--{0}={1}".format(key, value)