[gimp] app: another leaked GtkTreePath.

[Jehan <jehanp src gnome org>]

commit 1ece3675c9d5f76961b05edd5c82ab9242c74c9e
Author: Jehan <jehan girinstud io>
Date:   Fri Aug 20 22:00:03 2021 +0200

    app: another leaked GtkTreePath.
    
    Thanks to Massimo, again and again. ;-)

 app/dialogs/quit-dialog.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/app/dialogs/quit-dialog.c b/app/dialogs/quit-dialog.c
index f239627872..aa38bf547a 100644
--- a/app/dialogs/quit-dialog.c
+++ b/app/dialogs/quit-dialog.c
@@ -562,6 +562,8 @@ quit_close_all_dialog_save_clicked (GtkCellRenderer *cell,
             }
         }
     }
+
+  gtk_tree_path_free (path);
 }
 
 static gboolean