[IMP] only send domain if there's a value (the field is 'enabled')
[IMP] only send domain if there's a value (the field is 'enabled')

--HG--
extra : convert_revision : xmo%40openerp.com-20110324180028-orpo4ferkn9wnfox

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