setup.php: update code to web2project 3.2 API.

setup.php

@@ -18,6 +18,8 @@ $config['mod_type'] = 'user';
 $config['mod_ui_name'] = 'Backup';
 $config['mod_ui_icon'] = 'companies.gif';
 $config['mod_description'] = 'A module for backing up the database';
+$config['mod_config'] = false;
+$config['mod_main_class'] = 'CBackup';
 
 if (@$a == 'setup') {
 	echo w2PshowModuleConfig( $config );
@@ -26,15 +28,16 @@ if (@$a == 'setup') {
 class CSetupBackup {   
 
 	function install() {
-		return null;
+		return parent::install();
 	}
 	
 	function remove() {
-		return null;
+		return parent::remove();
 	}
 	
 	function upgrade() {
-		return null;
+		// Do nothing
+		return true;
 	}
 }