[FIX] form attachments: don't call dataset/search_read directly
[FIX] form attachments: don't call dataset/search_read directly

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