[gedit] GeditDocument: use the TeplFile location in is_untitled()

[Sébastien Wilmet <swilmet src gnome org>]

commit 85b007052d48fcff8c595fbbd2c2698a73cb2905
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Nov 20 07:21:16 2020 +0100

    GeditDocument: use the TeplFile location in is_untitled()

 gedit/gedit-document.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/gedit/gedit-document.c b/gedit/gedit-document.c
index 000143912..54c11a96c 100644
--- a/gedit/gedit-document.c
+++ b/gedit/gedit-document.c
@@ -1035,13 +1035,12 @@ gedit_document_saved_real (GeditDocument *doc)
 gboolean
 gedit_document_is_untitled (GeditDocument *doc)
 {
-       GeditDocumentPrivate *priv;
+       TeplFile *file;
 
        g_return_val_if_fail (GEDIT_IS_DOCUMENT (doc), TRUE);
 
-       priv = gedit_document_get_instance_private (doc);
-
-       return gtk_source_file_get_location (priv->file) == NULL;
+       file = tepl_buffer_get_file (TEPL_BUFFER (doc));
+       return tepl_file_get_location (file) == NULL;
 }
 
 /*