[FIX] stock_account: Automated FIFO error on MO

When trying to click on "Mark as Done" on a MO with raw materials in a category
with automated fifo valuation, it raised in some a case (in function called
"_prepare_account_move_line")  a user error saying:

"The cost of the product P is currently equal to 0. Change the cost or the
configuration of your product to avoid an incorrect valuation"

This problem coming from the fact that in some cases, self.price_unit was
equal to 1.04166666666667e-06 instead of 0

opw:1862153, 1866692

0 files changed, 0 insertions, 0 deletions