Description:
------------
I get a warning when using the activate signal on a GtkEntry.


Reproduce code:
---------------
<?php
//Start it and press return. Warning will come
$wnd = new GtkWindow();
$wnd->connect_simple('destroy', array('gtk', 'main_quit'));

$entry = new GtkEntry();
function echoit($value) { echo $value . "\r\n";}
$entry->connect_simple('activate', 'echoit', 'test');

$wnd->add($entry);
$wnd->show_all();
Gtk::main();
?>



Expected result:
----------------
output: test

Actual result:
--------------
PHP Warning:  PHP-GTK internal error: unsupported type (null) in
/data/cvs/phpgtk2/php-gtk/test/bug_gtkentry_activate.phpw on line 9
PHP Warning:  Could not convert return value of signal callback
'echoit' to '(null)' in
/data/cvs/phpgtk2/php-gtk/test/bug_gtkentry_activate.phpw on line 9