[Wine runner] NoneType object has no attribute 'formatted_playtime'

[Mershl]

Description

Using the Playtime field on a new locally installed game shows 'NoneType' object has no attribute 'formatted_playtime'.

First seen on 0.5.17

Steps to reproduce

1. Click +
2. Click Add locally installed game
3. Enter a Name: testgame
4. Select Runner: Wine
5. Enter a Playtime: 3h

[danieljohnson2]

This one is a client issue and should be reported at the Lutris client repo but I'll go ahead and fix it now.