[Bug 57202] steam client stops working on wine 8.19+ on Slackware 15.0 due to mono 8.10 update

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57202

--- Comment #12 from tjb  ---
(In reply to Esme Povirk from comment #11)
> Might be something weird going on with that prefix then and not related to
> Steam itself.

Prefix is fine before mono 8.10+ was added.  I'll check with a new prefix and
see if mono 8.10 broke the old prefix.  There was a similar breaking change to
an EA client prefix due to a DLL update.  Old prefixes (created with wines with
mono <8.10) start fine on the other programs though.