supplyOrdersDetailsImport Prestashop 1.5 FIX

public function supplyOrdersDetailsImport(){
...
if (isset($product['id_product']))
{
  if ($product['id_product'] == $id_product && $product['id_product_attribute']== $id_product_attribute)
$this->errors[] = sprintf($this->l('Product (%d/%D) cannot be added twice (at line %d).'), $id_product,$id_product_attribute, $current_line + 1);
else{
    $product['id_product'] = $id_product;
    $product['id_product_attribute']= $id_product_attribute;
}
}
....
}