launcher: don't try to switch to weston's vt

Signed-off-by: Giulio Camuffo <giuliocamuffo@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/libweston/launcher-direct.c b/libweston/launcher-direct.c
index 29d9c28..0ff99a4 100644
--- a/libweston/launcher-direct.c
+++ b/libweston/launcher-direct.c
@@ -305,6 +305,17 @@
 	free(launcher);
 }
 
+static int
+launcher_direct_get_vt(struct weston_launcher *base)
+{
+	struct launcher_direct *launcher = wl_container_of(base, launcher, base);
+	struct stat s;
+	if (fstat(launcher->tty, &s) < 0)
+		return -1;
+
+	return minor(s.st_rdev);
+}
+
 struct launcher_interface launcher_direct_iface = {
 	launcher_direct_connect,
 	launcher_direct_destroy,
@@ -312,4 +323,5 @@
 	launcher_direct_close,
 	launcher_direct_activate_vt,
 	launcher_direct_restore,
+	launcher_direct_get_vt,
 };