[Gammix]

Vehicle occupancy function:

pawn Код:

IsVehicleOccupied(vehicleid)
{
    foreach (new i : Player)
    {
        if (GetPlayerVehicleID(i) == vehicleid)
            return 1;
    }
    return 0;
}

Respawn all unoccupied vehicles:

pawn Код:

for(new i = 1, j = GetVehiclePoolSize(); i <= j; i++) 
{
    if (IsValidVehicle(i))
    {
        if (!IsVehicleOccupied(i))
            SetVehicleToRespawn(i);
    }
}

EDIT: Fixed returns.