[FIX] product: purchase report, correct warehouse

Fix stock warehouse column on purchase report,
we need to join stock_picking_type and stock_warehouse
in order to have the warehouse itself

Closes #6409

addons/purchase/report/purchase_report.py

@@ -75,7 +75,7 @@ class purchase_report(osv.osv):
                     s.dest_address_id,
                     s.pricelist_id,
                     s.validator,
-                    s.picking_type_id as picking_type_id,
+                    spt.warehouse_id as picking_type_id,
                     s.partner_id as partner_id,
                     s.create_uid as user_id,
                     s.company_id as company_id,
@@ -98,6 +98,7 @@ class purchase_report(osv.osv):
                             LEFT JOIN ir_property ip ON (ip.name='standard_price' AND ip.res_id=CONCAT('product.template,',t.id) AND ip.company_id=s.company_id)
                     left join product_uom u on (u.id=l.product_uom)
                     left join product_uom u2 on (u2.id=t.uom_id)
+                    left join stock_picking_type spt on (spt.id=s.picking_type_id)
                 group by
                     s.company_id,
                     s.create_uid,
@@ -116,7 +117,7 @@ class purchase_report(osv.osv):
                     t.categ_id,
                     s.date_order,
                     s.state,
-                    s.picking_type_id,
+                    spt.warehouse_id,
                     u.uom_type,
                     u.category_id,
                     t.uom_id,