[FIX] point_of_sale: controller pos/web redirects to session opening if no opened session

addons/point_of_sale/controllers/main.py

@@ -5,6 +5,7 @@ import os
 import openerp
 import time
 import random
+import werkzeug.utils
 
 from openerp import http
 from openerp.http import request
@@ -24,6 +25,8 @@ class PosController(http.Controller):
 
         PosSession = request.registry['pos.session']
         pos_session_ids = PosSession.search(cr, uid, [('state','=','opened'),('user_id','=',session.uid)], context=context)
+        if not pos_session_ids:
+            return werkzeug.utils.redirect('/web#action=point_of_sale.action_pos_session_opening')
         PosSession.login(cr,uid,pos_session_ids,context=context)
         
         modules =  simplejson.dumps(module_boot(request.db))