Handle restocking items
Some merchants have items with a negative count. This indicates that they should be restocked every 24 hours along with the merchant's gold pool. OpenMW does not do this yet.
(RM-1323 from redmine: created on 2014-05-10 by scrawl ., , closed on 2014-05-18 by scrawl ., relates #32 (closed))
Edited by redmine