[FIX] l10n_be_intrastat: traceback change new api

642fea4 updated some models to new API but this was not taken into
account into the part of the code this commit fix.

opw-677497

addons/l10n_be_intrastat/wizard/xml_decl.py

@@ -144,7 +144,8 @@ class xml_decl(osv.TransientModel):
         invoiceline_mod = self.pool['account.invoice.line']
         product_mod = self.pool['product.product']
         region_mod = self.pool['l10n_be_intrastat.region']
-        warehouse_mod = self.pool['stock.warehouse']
+        warehouse_mod = self.pool['stock.warehouse'].browse(cr, uid, [], context=context)
+        location_mod = warehouse_mod.env['stock.location']
 
         if dispatchmode:
             mode1 = 'out_invoice'
@@ -231,8 +232,8 @@ class xml_decl(osv.TransientModel):
                     cr, uid, [('invoice_lines', 'in', inv_line.id)], context=context)
                 if poline_ids:
                     purchaseorder = POL.browse(cr, uid, poline_ids[0], context=context).order_id
-                    region_id = warehouse_mod.get_regionid_from_locationid(
-                        cr, uid, purchaseorder._get_destination_location(), context=context)
+                    location = location_mod.browse(purchaseorder._get_destination_location())
+                    region_id = warehouse_mod.get_regionid_from_locationid(location)
                     if region_id:
                         exreg = region_mod.browse(cr, uid, region_id).code
             elif inv_line.invoice_id.type in ('out_invoice', 'out_refund'):