[FIX] purchase : Quantity and price calculation in journal entry corrected

lp bug: https://launchpad.net/bugs/740964 fixed

bzr revid: nep@tinyerp.com-20110608134640-nxz97kwir5tst5zb

diff --cc addons/purchase/stock.py
index f8f2142,52041d1..f595a3e
--- 1/addons/purchase/stock.py
--- 2/addons/purchase/stock.py
+++ b/addons/purchase/stock.py
@@@ -40,7 -40,8 +40,7 @@@ class stock_move(osv.osv)
              # no average price costing or cost not specified during picking validation, we will
              # plug the purchase line values if they are found.
              if move.purchase_line_id and move.picking_id.purchase_id.pricelist_id:
-                 reference_amount, reference_currency_id = move.purchase_line_id.price_unit, move.picking_id.purchase_id.pricelist_id.currency_id.id
 -                qty = self.pool.get('product.uom')._compute_qty(cr, uid, move.product_uom.id, move.product_qty, move.product_id.uom_id.id)
 -                reference_amount, reference_currency_id = move.purchase_line_id.price_unit * qty, move.picking_id.purchase_id.pricelist_id.currency_id.id
++                reference_amount, reference_currency_id = move.purchase_line_id.price_unit * move.product_qty, move.picking_id.purchase_id.pricelist_id.currency_id.id
          return reference_amount, reference_currency_id
  
  stock_move()