[FIX] problem with sidebar_eval_context

bzr revid: nicolas.vanhoren@openerp.com-20121122094347-q8evcsk7np2ja8xb

addons/web/static/src/js/views.js

@@ -1334,7 +1334,7 @@ instance.web.View = instance.web.Widget.extend({
         new instance.web.DataExport(this, this.dataset).open();
     },
     sidebar_eval_context: function () {
-        return $.when();
+        return $.when({});
     },
     /**
      * Asks the view to reload itself, if the reloading is asynchronous should