[gtk: 1/2] window: Fix memory leak

[Matthias Clasen <matthiasc src gnome org>]

commit b3c8c8e592b1d2911f16e9e51972fc993d20d213
Author: Yi-Soo An <yisooan gmail com>
Date:   Mon Aug 13 17:21:42 2018 +0900

    window: Fix memory leak
    
    https://gitlab.gnome.org/GNOME/gtk/issues/1268

 gtk/gtkwindow.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 500cef8e53..f65a7b98e8 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -10985,6 +10985,7 @@ gtk_window_export_handle (GtkWindow               *window,
 
       handle_str = g_strdup_printf ("x11:%x", xid);
       callback (window, handle_str, user_data);
+      g_free (handle_str);
 
       return TRUE;
     }