Comment # 5 on bug 1095419 from Bruce Rogers

It appears this is a bug introduced in v2.12.0 qemu. This version update just
went out to Tumbleweed recently. I've bisected the code down to this commit as
being the already available upstream fix:

commit e58d64a16abc2304c4dcb644411eb9580bf63b1e
Author: Marc-Andr� Lureau <marcandre.lureau@redhat.com>
Date:   Tue May 15 17:30:39 2018 +0200

    ccid-card-passthru: fix regression in realize()

    Since cc847bfd16d894fd8c1a2ce25f31772f6cdbbc74, CCID card-passthru
    fails to intialize, because it changed a debug line to an error,
    probably by mistake. Change it back to a DPRINTF debug.

    (solves Boxes creating VM with smartcard passthru failing to start)

    Signed-off-by: Marc-Andr� Lureau <marcandre.lureau@redhat.com>
    Reviewed-by: Philippe Mathieu-Daud� <f4bug@amsat.org>
    Message-id: 20180515153039.27514-1-marcandre.lureau@redhat.com
    Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

I'll add this fix for the next submission to Factory/Tumbleweed.