[FIX]

bzr revid: atp@tinyerp.com-20121011174126-lii90i9fnfhfsy9v

addons/hr_timesheet/hr_timesheet.py

@@ -154,7 +154,7 @@ class hr_analytic_timesheet(osv.osv):
         'date': lambda self, cr, uid, ctx: ctx.get('date', fields.date.context_today(self,cr,uid,context=ctx)),
         'user_id': lambda obj, cr, uid, ctx: ctx.get('user_id', False) or uid,
     }
-    def on_change_account_id(self, cr, uid, ids, account_id, user_id):
+    def on_change_account_id(self, cr, uid, ids, account_id):
         return {'value':{}}
 
     def on_change_date(self, cr, uid, ids, date):

addons/hr_timesheet_invoice/hr_timesheet_invoice.py

@@ -176,7 +176,7 @@ account_analytic_line()
 
 class hr_analytic_timesheet(osv.osv):
     _inherit = "hr.analytic.timesheet"
-    def on_change_account_id(self, cr, uid, ids, account_id, user_id):
+    def on_change_account_id(self, cr, uid, ids, account_id, user_id=False):
         res = {}
         if not account_id:
             return res