[FIX] stock_account: valuation entry for reconciled neg quant not always possible

Skip the creation of the corrective valuation entry
when a negative quant is reconciled with an incoming
shipment, when:
 - the cost has not changed, so the journal entry would
   be useless (credit/debit = 0)
 - or, when the accounting period for the move causing
   the negative quant is already closed, and must not be
   updated (presumably the valuation was manually
   set before closing that period)

0 files changed, 0 insertions, 0 deletions