rows-reordered class closure args

[Kevin Ryde <user42 zip com au>]

In a subclass of something implementing Gtk2::TreeModel it looks like
the class closure for rows-reordered misses out on the marshaller
turning the gint* array into a perl array.  Eg. the program below prints

    reordered class closure:
    $VAR1 = [
              bless( {}, 'MyStore' ),
              bless( do{\(my $o = 156748176)}, 'Gtk2::TreePath' ),
              undef,
              156950536
            ];

package MyStore;
use strict;
use warnings;
use Gtk2;
use Data::Dumper;

use Glib::Object::Subclass
  'Gtk2::ListStore',
  signals => { rows_reordered => \&my_rows_reordered };

sub my_rows_reordered {
  print "reordered class closure:\n";
  print Dumper(\ _);
}

package main;
use Gtk2 '-init';

my $store = MyStore->new;
$store->set_column_types ('Glib::String');
$store->set ($store->append, 0=>'one');
$store->set ($store->append, 0=>'two');

$store->rows_reordered (Gtk2::TreePath->new, undef,
                        1, 0);
exit 0;

--- GtkTreeModel.xs     07 Jul 2008 09:53:48 +1000      1.54
+++ GtkTreeModel.xs     25 Jul 2008 10:25:58 +1000      
@@ -629,6 +629,18 @@
 
 =cut
 
+=for position post_signals
+
+Note that currently in a Perl subclass of an object implementing
+C<Gtk2::TreeModel>, the class closure, ie. class default signal
+handler, for the C<rows-reordered> signal is called only with an
+integer address for the reorder array parameter, not a Perl arrayref
+like a handler installed with C<signal_connect> receives.  It works to
+C<signal_chain_from_overridden> with the address, but it's otherwise
+fairly useless and will likely change in the future.
+
+=cut
+
 =for apidoc __hide__
 =cut
 void