[tryton] Warning message when it is opened the Dashboard when there is no section into it

[Fabyc]

In tryton 3.2.1, when it is opened the Dashboard for first time, in 
background of the 
Tryton execution I get this warning message:

tryton-3.2.1/tryton/gui/window/view_form/view/form_gtk/parser.py:103: 
Warning: 
value "0" of type `guint' is invalid or out of range for property 
`n-columns' of type `guint'
  table = gtk.Table(1, col)

This warning appears only once by user session when there is not section in 
the Dashboard.