BANJA LUKA (Bosnia and Herzegovina), July 25 (SeeNews) – Poste Srpske [BANJ:POST-R-A], the state-controlled postal operator of Bosnia’s Serb Republic, said on Wednesday its net loss halved to 461,550 marka ($287,790/235,990 euro) in the first half of 2012 from 963,254 marka a year earlier.