fix upgrade script for notification types

src/upgrades/1.7.6/notification_types.js

@@ -12,12 +12,14 @@ module.exports = {
 				db.getObject('config', next);
 			},
 			function (config, next) {
+				var postNotifications = parseInt(config.sendPostNotifications, 10) === 1 ? 'notification' : 'none';
+				var chatNotifications = parseInt(config.sendChatNotifications, 10) === 1 ? 'notification' : 'none';
 				db.setObject('config', {
 					notificationType_upvote: config.notificationType_upvote || 'notification',
 					'notificationType_new-topic': config['notificationType_new-topic'] || 'notification',
-					'notificationType_new-reply': config['notificationType_new-reply'] || config.sendPostNotifications || 'notification',
+					'notificationType_new-reply': config['notificationType_new-reply'] || postNotifications,
 					notificationType_follow: config.notificationType_follow || 'notification',
-					'notificationType_new-chat': config['notificationType_new-chat'] || config.sendChatNotifications || 'notification',
+					'notificationType_new-chat': config['notificationType_new-chat'] || chatNotifications,
 					'notificationType_group-invite': config['notificationType_group-invite'] || 'notification',
 				}, next);
 			},