[Plugin: Socialize This] To delete warning and notice

I’m using this nice plugin (v.1.6.6) and I have WP_DEBUG always true for development.
So I see some warnings that could be deleted quickly.
Open socialize-this-php5-enviroment.php and edit these lines.

41:
FROM:
$plugin_page = add_submenu_page('options-general.php', 'Socialize This', 'Socialize This', 10, ST_FILE, array($this, 'socialize_this_settings'));
TO:
$plugin_page = add_submenu_page('options-general.php', 'Socialize This', 'Socialize This', 'manage_options', ST_FILE, array($this, 'socialize_this_settings'));

47;
FROM:
if($_GET['module'] == 'social_widgets'){
TO:
if( isset($_GET['module']) && $_GET['module'] == 'social_widgets'){

69:
FROM:
}elseif($_GET['module'] == ''){
TO:
}elseif( !isset($_GET['module']) || $_GET['module'] == ''){

133:
FROM:
if($_POST['Submit'] === 'Save Settings'){
TO:
if( isset($_POST['Submit']) && $_POST['Submit'] === 'Save Settings'){

I hope it could be useful.