Code review comment for ~paelzer/ubuntu/+source/qemu:merge-focal/4.2-for-focal

I cloned the repo and if i'm looking at it right, I believe this patch isn't included:
https://github.com/qemu/qemu/commit/725fe5d10dbd4259b1853b7d253cef83a3c0d22a

That fixes bug 1859527, and would be great to include here so the fix can be sru'ed back to b/e.