[BiosMarcel]

PHP код:

stock IsPoliceskin(playerid, skinId)
{
    if(IsACop(playerid))
    {
        if(!( (280 <= skinId) & (skinId <= 288) )) 
        {
            return 1;
        }
    }
    return 0;
}  
case G_LOCKER_UNIFORM: if(response)    {
    new skin = strval(inputtext);
    new iGroupID = PlayerInfo[playerid][pMember];
    //Like someone mentioned already it may be SendClientMessageEx
    if(IsPoliceskin(playerid, skin))
    {
        return SendClientMessageEx(playerid, COLOR_LIGHTRED, "[SERVER]: You're not in LSPD so you cannot use that skin"); 
    }            
    if(IsInvalidSkin(skin)) 
    {
        return ShowPlayerDialog(playerid, G_LOCKER_UNIFORM, DIALOG_STYLE_INPUT, arrGroupData[iGroupID][g_szGroupName],"Invalid skin specified. Choose another.", "Select", "Cancel");
    }
    PlayerInfo[playerid][pModel] = skin;
    SetPlayerSkin(playerid, PlayerInfo[playerid][pModel]);  
//}?
} 


If u write your code like that you can overlook it easier