[gnome-ostree] snapshot: Deal with potential missing items in the manifest

[Jasper St. Pierre <jstpierre src gnome org>]

commit cb88b1a2364346fed0478c0a4f8a5285610b148a
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Sat Jun 15 22:32:05 2013 -0400

    snapshot: Deal with potential missing items in the manifest

 src/js/snapshot.js |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/js/snapshot.js b/src/js/snapshot.js
index 136e39a..ec57e0e 100644
--- a/src/js/snapshot.js
+++ b/src/js/snapshot.js
@@ -88,6 +88,9 @@ const Snapshot = new Lang.Class({
     },
 
     _resolveComponent: function(manifest, componentMeta) {
+        if (!componentMeta)
+            return {};
+
        let result = {};
        Lang.copyProperties(componentMeta, result);
        let origSrc = componentMeta['src'];