[pybliographer] ui: Use Close button for error dialogs

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 28027800dac013be758389333302c8bc60b6d426
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Wed Mar 28 16:15:55 2018 -0300

    ui: Use Close button for error dialogs

 Pyblio/GnomeUI/Utils.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Pyblio/GnomeUI/Utils.py b/Pyblio/GnomeUI/Utils.py
index 5f6c960..e084662 100644
--- a/Pyblio/GnomeUI/Utils.py
+++ b/Pyblio/GnomeUI/Utils.py
@@ -217,7 +217,7 @@ def error_dialog_s(parent, primary, secondary=None):
     dialog = gtk.MessageDialog(parent,
                                gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
                                gtk.MESSAGE_ERROR,
-                               gtk.BUTTONS_CANCEL, primary)
+                               gtk.BUTTONS_CLOSE, primary)
     if secondary:
         dialog.format_secondary_text(secondary)
     dialog.run()