[gnome-shell/gnome-3-38] windowManager: Avoid calling meta_window_actor_thaw when not frozen

[Florian Müllner <fmuellner src gnome org>]

commit 98234acd5b48a58c2d112b5edb3dddb85e04a643
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Fri Oct 2 08:33:31 2020 +0000

    windowManager: Avoid calling meta_window_actor_thaw when not frozen
    
    Because that tends to crash in:
    ```
    g_error ("Error in freeze/thaw accounting");
    ```
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1431
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1453
    
    
    (cherry picked from commit 6ba3ca5f9548ba0a87a9e3ffa129716d0a062e1e)

 js/ui/windowManager.js | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/js/ui/windowManager.js b/js/ui/windowManager.js
index ab86a2e6a3..91b764ea8d 100644
--- a/js/ui/windowManager.js
+++ b/js/ui/windowManager.js
@@ -1378,6 +1378,10 @@ var WindowManager = class {
             onStopped: () => this._sizeChangeWindowDone(shellwm, actor),
         });
 
+        // ease didn't animate and cleared the info, we are done
+        if (!actor.__animationInfo)
+            return;
+
         // Now unfreeze actor updates, to get it to the new size.
         // It's important that we don't wait until the animation is completed to
         // do this, otherwise our scale will be applied to the old texture size.