[mutter] clutter/actor: Always query layout manager when getting size

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit ad50d2cfc4596d27645333f44bf57d68dbf696ae
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Thu Jun 18 17:07:33 2020 +0200

    clutter/actor: Always query layout manager when getting size
    
    There are cases where a layout manager used by an actor also wants to
    return a custom size when the actor has no children, for example in case
    the layout manager requests a fixed size. This is currently impossible
    because we only query the layout manager when calculating the preferred
    size if the actor has children.
    
    So fix that and also use the layout managers size negotiation functions
    in case the actor has no children.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1322

 clutter/clutter/clutter-actor.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/clutter/clutter/clutter-actor.c b/clutter/clutter/clutter-actor.c
index 7f6ef007b7..01a238274f 100644
--- a/clutter/clutter/clutter-actor.c
+++ b/clutter/clutter/clutter-actor.c
@@ -2443,8 +2443,7 @@ clutter_actor_real_get_preferred_width (ClutterActor *self,
 {
   ClutterActorPrivate *priv = self->priv;
 
-  if (priv->n_children != 0 &&
-      priv->layout_manager != NULL)
+  if (priv->layout_manager != NULL)
     {
       ClutterContainer *container = CLUTTER_CONTAINER (self);
 
@@ -2483,8 +2482,7 @@ clutter_actor_real_get_preferred_height (ClutterActor *self,
 {
   ClutterActorPrivate *priv = self->priv;
 
-  if (priv->n_children != 0 &&
-      priv->layout_manager != NULL)
+  if (priv->layout_manager != NULL)
     {
       ClutterContainer *container = CLUTTER_CONTAINER (self);