[fix] problem with some server errors that have a fault_code which is an int
[fix] problem with some server errors that have a fault_code which is an int

gisce/openerp-web,gisce/openerp-web,splbio/openerp-web,vnc-biz/openerp-web,splbio/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,vnc-biz/openerp-web,vnc-biz/openerp-web