[gnome-contacts] src: Use format strings when constructing MessageDialogs

[Niels De Graef <nielsdg src gnome org>]

commit 3960876475b788e0a997b1e43d9e66fadc79e1ef
Author: Philip Withnall <withnall endlessm com>
Date:   Thu Apr 18 18:39:07 2019 +0100

    src: Use format strings when constructing MessageDialogs
    
    Otherwise translations of the messages passed in might contain format
    placeholders which would then cause a read from an unexpected bit of the
    stack.
    
    This incorporates a patch by Cosimo Cecchi <cosimo endlessm com>.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 src/contacts-contact-pane.vala | 2 +-
 src/contacts-utils.vala        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/contacts-contact-pane.vala b/src/contacts-contact-pane.vala
index 1fabeff..0e11e72 100644
--- a/src/contacts-contact-pane.vala
+++ b/src/contacts-contact-pane.vala
@@ -322,7 +322,7 @@ public class Contacts.ContactPane : Stack {
                            DialogFlags.DESTROY_WITH_PARENT | DialogFlags.MODAL,
                            MessageType.ERROR,
                            ButtonsType.OK,
-                           message);
+                           "%s", message);
     dialog.run ();
     dialog.destroy ();
   }
diff --git a/src/contacts-utils.vala b/src/contacts-utils.vala
index 5552e8c..396aad9 100644
--- a/src/contacts-utils.vala
+++ b/src/contacts-utils.vala
@@ -169,7 +169,7 @@ namespace Contacts.Utils {
                                         Gtk.DialogFlags.MODAL,
                                         Gtk.MessageType.ERROR,
                                         Gtk.ButtonsType.OK,
-                                        error);
+                                        "%s", error);
     dialog.run();
     dialog.destroy();
   }