weston: Rename weston_output_init_pending() to weston_output_init()

v2:

 - Rebased for latest changes.

v3:

 - Rebased for changes in wayland backend.

Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Armin Krezović <krezovic.armin@gmail.com>
diff --git a/libweston/compositor-headless.c b/libweston/compositor-headless.c
index ea23717..e7fc397 100644
--- a/libweston/compositor-headless.c
+++ b/libweston/compositor-headless.c
@@ -239,7 +239,7 @@
 	output->base.disable = headless_output_disable;
 	output->base.enable = headless_output_enable;
 
-	weston_output_init_pending(&output->base, compositor);
+	weston_output_init(&output->base, compositor);
 	weston_compositor_add_pending_output(&output->base, compositor);
 
 	return 0;