[gnome-shell] shell/window-tracker: Minor simplification

[Florian Müllner <fmuellner src gnome org>]

commit bf47d1b22db3c96009cb6e0e41a0cf5aba04425f
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Jul 3 17:28:45 2020 +0200

    shell/window-tracker: Minor simplification
    
    Switching to autocleanup gives us a better separation between the
    app/no-app cases.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/219

 src/shell-window-tracker.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/src/shell-window-tracker.c b/src/shell-window-tracker.c
index 0474f00145..8e17f2deb4 100644
--- a/src/shell-window-tracker.c
+++ b/src/shell-window-tracker.c
@@ -214,7 +214,7 @@ get_app_from_id (MetaWindow  *window,
 {
   ShellApp *app;
   ShellAppSystem *appsys;
-  char *desktop_file;
+  g_autofree char *desktop_file = NULL;
 
   g_return_val_if_fail (id != NULL, NULL);
 
@@ -223,10 +223,9 @@ get_app_from_id (MetaWindow  *window,
   desktop_file = g_strconcat (id, ".desktop", NULL);
   app = shell_app_system_lookup_app (appsys, desktop_file);
   if (app)
-    g_object_ref (app);
+    return g_object_ref (app);
 
-  g_free (desktop_file);
-  return app;
+  return NULL;
 }
 
 /*