[HurtLocker]

You have to add a 4th variable which drags the interior id on disconnect. Like if you have already Pos[3] make it Pos[4] and on playerdisconnect: Pos[3]=GetPlayerInterior(playerid);

EDIT: I suppose you defined Pos[3] like Float:Pos[3] so the interior id cannot be saved in any of this array's cell since its integer. So create a different variable to save the interior id