LMS random player.

function random_player_from_lms()
{
    // Don't do anything if there's no player connected
    if (GetPlayers() <= 0) return null;
    // Use an array to gather all candidates
    local players = [];
    // NOTE: Use reversed loop to avoid calling GetMaxPlayers() on each iteration
    for (local id = GetMaxPlayers()-1; id >= 0; id--) {
        // Get the player instance associated with the current ID
        local i_player = FindPlayer(id);
        // See if the player is a possible candidate and store it's ID
        if (i_player != null && pArena[ i_player.ID ].LMS) players.push(i_player.ID);
    }
    // Feed the random generator seed. Use GetTickCount() to increase the randomness.
    srand(GetTickCount());
    // Return a random player from the possible candidates
    return FindPlayer(players[rand() % players.len()]);
}