PURPOSE Before this commit when the method returned an empty string, the calling method _fetchData couldn't processed map() on the result. After this commit the result will be an empty array thus the map method won't fail. LINKS Task-2489680 PR : odoo/odoo# closes odoo/odoo#76497 X-original-commit: ef813860b7582e9f1a92debb40d6dcda5519e607 Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>