[TUT] Radio dialog

#include 
#include 

#define C_RED 0xAA3333AA 
#define COLOR_YELLOW 0xFFFF00AA
#define C_GREEN 0x33AA33AA

#define DIALOG_RADIO 1

new islistening;

public OnPlayerConnect(playerid)
{
    islistening = 0;
    return 1;
}

CMD:radio(playerid,cmdtext[])
{
    if(!IsPlayerInAnyVehicle(playerid)) return SendClientMessage(playerid, C_RED, "Nisi u vozilu!");
    ShowPlayerDialog(playerid, DIALOG_RADIO, DIALOG_STYLE_LIST, "Radio Stanicce","1. Radio 1\r\n2. Radio 2\r\n3. Radio 3\r\n4. Radio 4","Listen","Cancel");
    return 1;
}
CMD:stopradio(playerid,cmdtext[])
{
    if(!IsPlayerInAnyVehicle(playerid)) return SendClientMessage(playerid, C_RED, "Nisi u vozilu!");
    if(islistening == 1) 
    {
        StopAudioStreamForPlayer(playerid); 
        SendClientMessage(playerid, C_RED, "Ugasio si radio!"); 
    }
    else //if the variable is 0
    {
        SendClientMessage(playerid, C_RED, "Ne slusate radio!"); 
    }
    return 1;
} 

public OnPlayerExitVehicle(playerid,vehicleid) 
{
    StopAudioStreamForPlayer(playerid); 
    return 1;
}

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    switch(dialogid)
    {
        case DIALOG_RADIO:
        {
            if(!response) 
            {
                SendClientMessage(playerid, C_RED, "You cancelled!"); 
            }
            if(response) 
            {
                switch(listitem)
                {
                    case 0: 
                    {
                        islistening = 1; 
                        PlayAudioStreamForPlayer(playerid,"http://yp.shoutcast.com/sbin/tunein-station.pls?id=1281016&play_status=1"); 
                    }
                    case 1: //same as case 0: etc...
                    {
                        islistening = 1;
                        PlayAudioStreamForPlayer(playerid,"http://yp.shoutcast.com/sbin/tunein-station.pls?id=1283516&play_status=1");
                    }
                    case 2:
                    {
                        islistening = 1;
                        PlayAudioStreamForPlayer(playerid,"http://yp.shoutcast.com/sbin/tunein-station.pls?id=1283516&play_status=1");
                    }
                    case 3:
                    {
                        islistening = 1;
                        PlayAudioStreamForPlayer(playerid,"http://yp.shoutcast.com/sbin/tunein-station.pls?id=663859&play_status=1");
                    }
                }
            }
        }
    }
    return 1;
}