Comment on Migration_2_4 in tryton

[try...@googlecode.com]

Comment by grasba...@gmail.com:

Be aware, that's from now on cost_price and list_price are required in
module product. They can be 0 - but they have to be set. As it is a
property, you must create properties for each record of product_template
according to each company you have in your setup.

For more information:
http://code.google.com/p/tryton/wiki/Migration_2_4