[fix] problem with new login, when the user is not really already logged in

bzr revid: nicolas.vanhoren@openerp.com-20110913121038-0x7tifkpzgplk6lb

addons/web/controllers/main.py

@@ -301,10 +301,9 @@ class Session(openerpweb.Controller):
         }
     @openerpweb.jsonrequest
     def get_session_info(self, req):
-        ctx = req.session.get_context()
         return {
             "uid": req.session._uid,
-            "context": ctx,
+            "context": req.session.get_context() if req.session._uid else False,
             "db": req.session._db
         }
     @openerpweb.jsonrequest