overviewControls: Fix warning on shutdown

ClutterActor unsets its layout manager's :container property during
dispose, so the corresponding vfunc should handle being passed NULL.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1909>

diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 88726573dc546fe7c7f597779fba04b0b29c01e0..c153161696b80f5b192c8bf028ba1959fca01c8c 100644 (file)
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -112,7 +112,8 @@ class ControlsManagerLayout extends Clutter.BoxLayout {
 
     vfunc_set_container(container) {
         this._container = container;
-        this.hookup_style(container);
+        if (container)
+            this.hookup_style(container);
     }
 
     vfunc_get_preferred_width(_container, _forHeight) {