NPC NPCs and Stackable Items

[kends]

Hi.

My NPC's don't buy stackable items, like Potions, Runes and Creature Products.
When I try to sell, for example, 100 sandcrawler shell, a cancel message is shown:

code:
You do not have this object

Someone know how I can solve this problem?
Doesn't matter if the fix is in sources or in LUA. Please help

Thanks!


Edition

I already tried this source edition:

Code:
li.itemId = intValue;
const ItemType& it = Item::items[li.itemId];

if(readXMLInteger(tmpNode, "subtype", intValue))
li.subType = intValue;
else
{
if(it.stackable)
li.subType = 1;
else if(it.isFluidContainer() || it.isSplash())
li.subType = 0;
}

 

[Cykotitan]

try modules.lua callbackOnSell, remove the subType check

if(item.id == itemid[B] and item.subType == subType[/B])