irssi: Close all queries

This irssi script creates a new command to close all open queries at once. I don't know what else to explain here, i think the script explains itself.

use strict;
use warnings;
use Irssi;
use Glib;
use POE qw(Loop::Glib Session::Irssi);

my $VERSION = '0.1';
my %IRSSI = (
    authors     => 'Johannes Plunien',
    contact     => 'http://www.pqpq.de/contact/',
    license     => 'Perl',
);

POE::Session::Irssi->create(
    irssi_commands => {
        qc => sub {
            foreach my $w (Irssi::windows()) {
                my $act = $w->{active};
                next unless defined $act->{type};
                $w->command("window close") if $act->{type} eq 'QUERY';
            }
        },
    },
);