char: add backend hotswap handler

Frontends should have an interface to setup the handler of a backend change.
The interface will be used in the next commits

Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1499342940-56739-3-git-send-email-anton.nefedov@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/qtest.c b/qtest.c
index 9a5d1dc..88a09e9 100644
--- a/qtest.c
+++ b/qtest.c
@@ -691,7 +691,7 @@ void qtest_init(const char *qtest_chrdev, const char *qtest_log, Error **errp)
 
     qemu_chr_fe_init(&qtest_chr, chr, errp);
     qemu_chr_fe_set_handlers(&qtest_chr, qtest_can_read, qtest_read,
-                             qtest_event, &qtest_chr, NULL, true);
+                             qtest_event, NULL, &qtest_chr, NULL, true);
     qemu_chr_fe_set_echo(&qtest_chr, true);
 
     inbuf = g_string_new("");