[Konstantinos]

That depends on you. What do you want to do if CurrentHouse of a player is -1? Return an error for something (again, it depends on you and how you scripted it) or if you don't want to do anything, just check if it's not -1 and do your code.

An example for the last:

pawn Код:

if (HouseID != -1)
{
    for (CarSlot = 0; CarSlot < 20; CarSlot++)
        if (AHouseData[HouseID][VehicleIDs][CarSlot] != 0)
            HouseHasCars = true;
}