[Pawn] Need assistance

[Cruncher]

PHP Code:

if(strcmp(cmd, "/resfacveh", true) == 0 || strcmp(cmd, "/rffv", true) == 0) // by Mikkel Reimer
{
    if(IsPlayerConnected(playerid))
    {
        if(!IsACop(playerid))
{
    SendClientMessage(playerid, COLOR_GRAD1, "  you are not authorized to use that command!");
    return 1;
}
new bool:unwanted[LSPDCars];
for(new player=0; player<MAX_PLAYERS; player++)
    {
            if(IsPlayerInAnyVehicle(player)) { unwanted[GetPlayerVehicleID(player)]=true; }
    }
for(new LSPDCars = 1; LSPDCars <= 25; LSPDCars++)
{
if(!unwanted[LSPDCars]) SetVehicleToRespawn(LSPDCars);
}
GetPlayerName(playerid, sendername, sizeof(sendername));
format(string, sizeof(string), "SERVER: "COL_WHITE"All unused vehicles were respawned by Administrator %s.", sendername);
SendClientMessageToAll(COLOR_YELLOW,string);
}
return 1;
} 


I keep getting error with the "bool:unwanted" line trying to work out another way to to detect and avoid respawning vehicles that dont have a driver
Any help or advise would be appreciated...