fixed issue #12: bookmarks blow up if no cookie
fixed issue #12: bookmarks blow up if no cookie

grengojbo/grappelli-admin-tools-trunk,grengojbo/grappelli-admin-tools,grengojbo/grappelli-admin-tools,grengojbo/grappelli-admin-tools,grengojbo/grappelli-admin-tools-trunk,grengojbo/grappelli-admin-tools-trunk