CMD:respawnallveh(playerid, params[])
{
    new Msg[128], AdName[24];

    SendAdminText(playerid, "/respawnallveh", params);

    if (APlayerData[playerid][LoggedIn] == true)
    {
       if (APlayerData[playerid][PlayerLevel] >= 3)
       {
           for(new i=0; i<MAX_VEHICLES; i++)
           {
               if(IsVehicleEmpty(i)) SetVehicleToRespawn(i);
           }
           GetPlayerName(playerid, AdName, sizeof(AdName));
           format(Msg, sizeof(Msg), "** Administrator %s has respawned all the vehicles.", AdName);
           SendClientMessageToAll(ADCOLOR, Msg);
       }
       else
           return 0;
    }
    else
        return 0;
    return 1;
}

stock IsVehicleEmpty(vehicleid)
{
    for(new i=0; i<MAX_PLAYERS; i++)
    {
        if(IsPlayerInVehicle(i, vehicleid)) return 0;
    }
    return 1;
}