[extensions-web] Fix "old version" detection when in a preview.

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

commit dabea1d5ae7ac7faa101e4795781feec90c6c550
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Sep 23 15:32:30 2011 -0400

    Fix "old version" detection when in a preview.

 sweettooth/extensions/views.py |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/sweettooth/extensions/views.py b/sweettooth/extensions/views.py
index 5f2ebde..e094094 100644
--- a/sweettooth/extensions/views.py
+++ b/sweettooth/extensions/views.py
@@ -102,7 +102,9 @@ class ExtensionVersionView(DetailView):
             context['is_editable'] = status in models.EDITABLE_STATUSES
             context['is_visible'] = status in models.VISIBLE_STATUSES
             context['is_rejected'] = status in models.REJECTED_STATUSES
-            context['old_version'] = self.object != self.object.extension.latest_version
+
+            if not is_preview:
+                context['old_version'] = self.object != self.object.extension.latest_version
             context['status'] = status
             return self.render_to_response(context)