[extensions-web] views: Make sure we don't show all extensions when the version doesn't exist

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

commit dc4563569f03ba1ed53c1a72c01518fe684f62ec
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Jun 24 12:44:30 2013 -0400

    views: Make sure we don't show all extensions when the version doesn't exist

 sweettooth/extensions/views.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/sweettooth/extensions/views.py b/sweettooth/extensions/views.py
index f08ad42..f03f522 100644
--- a/sweettooth/extensions/views.py
+++ b/sweettooth/extensions/views.py
@@ -120,7 +120,7 @@ def shell_update(request):
 def ajax_query_params_query(request, versions, n_per_page):
     version_qs = models.ExtensionVersion.objects.visible()
 
-    if versions:
+    if versions is not None:
         version_qs = version_qs.filter(shell_versions__in=versions)
 
     queryset = models.Extension.objects.distinct().filter(versions__in=version_qs)