product variant name not populated in Purchase Order

[Selvam]

Hi,

I am using 5.0.15 stable version, Ubuntu 10.04.

Product variant name is not being populated in description field when adding a product to Purchase Order Line.

For eg:
          If the product name is ABC with code XY and variant is Color:Red.

         In Purchase Order Line description field, I get only "[XY] ABC" rather than "[XY] ABC - Color:Red".

I analyzed bit further, and in product/product.py, partner_ref functional field is the one which is being populated in description field of purchase order line. The appropriate function of that field does not seem to respect variants.

Though, I have fixed it, I would like to know whether it is an expected behavior or a bug.