[FIX] purchase: missing depends
[FIX] purchase: missing depends

In case the product is a service, no move_ids are linked to it, and
the quantity delivered is never calculated.

sysadminmatmoz/OCB,laslabs/odoo,laslabs/odoo,microcom/odoo,ygol/odoo,dfang/odoo,sysadminmatmoz/OCB,optima-ict/odoo,sysadminmatmoz/OCB,dfang/odoo,syci/OCB,laslabs/odoo,optima-ict/odoo,syci/OCB,sysadminmatmoz/OCB,bplancher/odoo,Elico-Corp/odoo_OCB,ygol/odoo,sysadminmatmoz/OCB,microcom/odoo,optima-ict/odoo,microcom/odoo,bplancher/odoo,microcom/odoo,laslabs/odoo,syci/OCB,sysadminmatmoz/OCB,stephen144/odoo,storm-computers/odoo,storm-computers/odoo,sysadminmatmoz/OCB,optima-ict/odoo,syci/OCB,Elico-Corp/odoo_OCB,dfang/odoo,stephen144/odoo,microcom/odoo,ygol/odoo,syci/OCB,hip-odoo/odoo,hip-odoo/odoo,storm-computers/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,bplancher/odoo,bplancher/odoo,optima-ict/odoo,stephen144/odoo,dfang/odoo,laslabs/odoo,bplancher/odoo,storm-computers/odoo,stephen144/odoo,hip-odoo/odoo,ygol/odoo,stephen144/odoo,dfang/odoo,storm-computers/odoo,Elico-Corp/odoo_OCB,dfang/odoo,microcom/odoo,laslabs/odoo,hip-odoo/odoo,ygol/odoo,Elico-Corp/odoo_OCB,optima-ict/odoo,stephen144/odoo,syci/OCB,storm-computers/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,bplancher/odoo