Fix conversion

packages/rocketchat-lib/server/functions/sendMessage.js

@@ -10,7 +10,7 @@ RocketChat.sendMessage = function(user, message, room, upsert = false) {
 		message.msg = '';
 	}
 	message.rid = room._id;
-	if (room.usernames || room.usernames.length === 0) {
+	if (!room.usernames || room.usernames.length === 0) {
 		const updated_room = RocketChat.models.Rooms.findOneById(room._id);
 		if (updated_room != null) {
 			room = updated_room;

packages/rocketchat-livechat/app/client/views/switchDepartment.js

@@ -44,7 +44,7 @@ Template.switchDepartment.events({
 			closeOnConfirm: true,
 			html: false
 		}, () => {
-			Meteor.call('livechat:closeByVisitor', (error) => {
+			Meteor.call('livechat:closeByVisitor', visitor.getRoom(), (error) => {
 				if (error) {
 					return console.log('Error ->', error);
 				}