[FIX] gantt: don't use dataset/search_read directly
[FIX] gantt: don't use dataset/search_read directly
splbio/openerp-web,vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,vnc-biz/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,MarkusTeufelberger/openerp-web,gisce/openerp-web,vnc-biz/openerp-web,vnc-biz/openerp-web,splbio/openerp-web,gisce/openerp-web