Fixed #15212 -- ensure that ModelAdmin.get_actions still returns a SortedDict if…

Fixed #15212 -- ensure that ModelAdmin.get_actions still returns a SortedDict if there are no actions.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15393 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/options.py

@@ -547,7 +547,7 @@ class ModelAdmin(BaseModelAdmin):
         # want *any* actions enabled on this page.
         from django.contrib.admin.views.main import IS_POPUP_VAR
         if self.actions is None or IS_POPUP_VAR in request.GET:
-            return []
+            return SortedDict()
 
         actions = []