Bug#1051492: is subject necessary

[Alfred Agrell <blubban@gmail.com>]

And that commit does indeed change window handling:

https://salsa.debian.org/wine-team/wine/-/commit/e055001f272c3a3d7a0b28865f1de9fda13c2f10#fb90e219a3e9d2931384a3375b23cedfd6b428fb

Manually applying that piece to upstream Wine reproduces the issue (or 
at least reproduces issue #1043052 - I don't have Syberia, so I can't 
test that one).

The problem is that escape.drawable is often assigned 0 in the loop, and 
if that happens, it undoes the X11DRV_get_whole_window( top ) and does 
something inappropriate.

Since escape.drawable is already set to 0 at the top of that function, I 
have no idea what warning that patch is trying to remove, and I believe 
the best solution would be simply reverting that part.