[gnome-shell/wip/exalm/query-exists] background: Check if the file exists before loading it

[Alexander Mikhaylenko <alexm src gnome org>]

commit d8fcac708ca74903f062eb43c2e4dd9d2d9e7246
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sat Feb 12 18:33:51 2022 +0500

    background: Check if the file exists before loading it
    
    Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5062

 js/ui/background.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/background.js b/js/ui/background.js
index 21359d0a83..5944cd183d 100644
--- a/js/ui/background.js
+++ b/js/ui/background.js
@@ -514,7 +514,7 @@ var Background = GObject.registerClass({
 
         this._loadPattern();
 
-        if (!this._file) {
+        if (!this._file || !this._file.query_exists(null)) {
             this._setLoaded();
             return;
         }