Restart weston with tty in graphics mode

We would like to restart weston, in case of a crash, or if the watchdog detects a problem.

If weston is restarted with the same parameter --tty=1, we get the error message tty1 is already in graphics mode, is another display server running?.

Our provisional solution is to patch libweston/launcher-direct.c:

iff --git a/libweston/launcher-direct.c b/libweston/launcher-direct.c
index 9fa329b6..b55f8be9 100644
--- a/libweston/launcher-direct.c
+++ b/libweston/launcher-direct.c
@@ -160,7 +160,6 @@ setup_tty(struct launcher_direct *launcher, int tty)
        if (kd_mode != KD_TEXT) {
                weston_log("%s is already in graphics mode, "
                           "is another display server running?\n", tty_device);
-               goto err_close;
        }
 
        ioctl(launcher->tty, VT_ACTIVATE, minor(buf.st_rdev));

Maybe it is a good solution to add a command line parameter that turns off this test?