[latexila] MainWindow: 'save before closing' dialog: use get_short_name()

[Sébastien Wilmet <swilmet src gnome org>]

commit 50aba9231ce97ff90a1cb67a793bf6f4b3d15e42
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Aug 6 16:47:29 2017 +0200

    MainWindow: 'save before closing' dialog: use get_short_name()

 src/main_window.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/main_window.vala b/src/main_window.vala
index 608ea4c..b8f5750 100644
--- a/src/main_window.vala
+++ b/src/main_window.vala
@@ -769,7 +769,7 @@ public class MainWindow : ApplicationWindow
                 MessageType.QUESTION,
                 ButtonsType.NONE,
                 _("Save changes to document \"%s\" before closing?"),
-                tab.label_text);
+                tab.get_buffer ().get_file ().get_short_name ());
 
             dialog.add_buttons (_("Close _without Saving"), ResponseType.CLOSE,
                 _("_Cancel"), ResponseType.CANCEL);