qom: Crash more nicely on object_property_get_link() failure

Pass &error_abort instead of NULL where the returned value is
dereferenced or asserted to be non-null.  Drop a now redundant
assertion.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200707160613.848843-24-armbru@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/ui/vnc.c b/ui/vnc.c
index 527ad25124..f006aa1afd 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -568,7 +568,7 @@ VncInfo2List *qmp_query_vnc_servers(Error **errp)
                        &info->vencrypt, &info->has_vencrypt);
         if (vd->dcl.con) {
             dev = DEVICE(object_property_get_link(OBJECT(vd->dcl.con),
-                                                  "device", NULL));
+                                                  "device", &error_abort));
             info->has_display = true;
             info->display = g_strdup(dev->id);
         }