[gnome-ostree] task: Add missing cancellable

[Colin Walters <walters src gnome org>]

commit 16efb64bdeb9c3ef69c367b28263a223e6e38fa7
Author: Colin Walters <walters verbum org>
Date:   Sun Jun 16 11:03:13 2013 -0400

    task: Add missing cancellable

 src/js/task.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/js/task.js b/src/js/task.js
index dbaa199..bf2f331 100644
--- a/src/js/task.js
+++ b/src/js/task.js
@@ -467,7 +467,7 @@ const TaskRunner = new Lang.Class({
         this.changed = true;
         let modifiedPath = this._taskCwd.get_child('modified.json');
         if (modifiedPath.query_exists(null)) {
-            let data = JsonUtil.loadJson(modifiedPath);
+            let data = JsonUtil.loadJson(modifiedPath, null);
             this.changed = data['modified'];
         }