Use boost::thread instead of std::thread

modules/game_npctrade/npctrade.lua

@@ -252,6 +252,7 @@ function getItemPrice(item, single)
   if not single then
     amount = quantityScroll:getValue()
   end
+  
   if getCurrentTradeType() == BUY then
     if buyWithBackpack:isChecked() then
       if item.ptr:isStackable() then
@@ -391,6 +392,7 @@ function refreshPlayerGoods()
 end
 
 function onOpenNpcTrade(items)
+  table.dump(items)
   tradeItems[BUY] = {}
   tradeItems[SELL] = {}