If the digits of the field is 0, than using '0.0' trigger the validation error
introduced by 2be02f249a1d.
Closes#13197
(grafted from 979cd092ea24f04328af5f4ff315c418e1c5b3e6)
--HG--
branch : 7.0
On outgoing move of FIFO product, the cost price is filled with the average
cost of the first products used. But for history we need to keep the cost
price of the product when move was done.
Cédric Krier