[FIX] hr_timesheet_sheet: avoid error when sort attendances

When an attendance line is edited, the tuple has no key 'name' which lead to a traceback.
Fixes #546

addons/hr_timesheet_sheet/hr_timesheet_sheet.py

@@ -106,7 +106,10 @@ class hr_timesheet_sheet(osv.osv):
         for att_tuple in attendance_tuples:
             if att_tuple[0] in [0,1,4]:
                 if att_tuple[0] in [0,1]:
-                    name = att_tuple[2]['name']
+                    if att_tuple[2] and att_tuple[2].has_key('name'):
+                        name = att_tuple[2]['name']
+                    else:
+                        name = self.pool['hr.attendance'].browse(cr, uid, att_tuple[1]).name
                 else:
                     name = self.pool['hr.attendance'].browse(cr, uid, att_tuple[1]).name
                 date_attendances.append((1, name, att_tuple))