[fix] problem with gantt view, was crashing when no records to show
[fix] problem with gantt view, was crashing when no records to show


havt/openerp-web,havt/openerp-web,akretion/openerp-web,akretion/openerp-web,havt/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web