qemu-char: remove all msgfds on disconnect

Disconnect should reset context.
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

qemu-char.c

@@ -2774,6 +2774,7 @@ static void tcp_chr_disconnect(CharDriverState *chr)
         s->listen_tag = qio_channel_add_watch(
             QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL);
     }
+    tcp_set_msgfds(chr, NULL, 0);
     remove_fd_in_watch(chr);
     object_unref(OBJECT(s->sioc));
     s->sioc = NULL;