[Ash.]

Mm; I guess you could do something like:

pawn Код:

stock GetVehicleDriver(vid)
{
     for(new i; i < GetMaxPlayers(); i++) 
     {
          if(!IsPlayerConnected(i)) continue;
          if(GetPlayerVehicleID(i) == vid && GetPlayerSeat(playerid) == 0) return i;
     }
     return INVALID_PLAYER_ID;
}

Usage: GetVehicleDriver(vehicleid)
if the vehicle is occupied. It will return the drivers player id. If it is not occupied it will return INVALID_PLAYER_ID.