[gtk+/gtk-3-18] message dialog: Prevent empty title from being shown

[Matthias Clasen <matthiasc src gnome org>]

commit f83878c90491990239152c42b0f8b5fe8ef01607
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jan 15 11:58:51 2016 -0500

    message dialog: Prevent empty title from being shown
    
    We don't want to grow the titlebar by showing an empty label.

 gtk/gtkmessagedialog.c     |    1 +
 gtk/ui/gtkmessagedialog.ui |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkmessagedialog.c b/gtk/gtkmessagedialog.c
index f20674a..2c0f440 100644
--- a/gtk/gtkmessagedialog.c
+++ b/gtk/gtkmessagedialog.c
@@ -440,6 +440,7 @@ gtk_message_dialog_constructed (GObject *object)
       gtk_widget_show (box);
       gtk_widget_set_size_request (box, -1, 16);
       label = gtk_label_new ("");
+      gtk_widget_set_no_show_all (label, TRUE);
       gtk_widget_set_margin_top (label, 6);
       gtk_widget_set_margin_bottom (label, 6);
       gtk_style_context_add_class (gtk_widget_get_style_context (label), "title");
diff --git a/gtk/ui/gtkmessagedialog.ui b/gtk/ui/gtkmessagedialog.ui
index 09b0eaa..de89f6e 100644
--- a/gtk/ui/gtkmessagedialog.ui
+++ b/gtk/ui/gtkmessagedialog.ui
@@ -2,7 +2,7 @@
 <interface domain="gtk30">
   <!-- interface-requires gtk+ 3.10 -->
   <template class="GtkMessageDialog" parent="GtkDialog">
-    <property name="title"> </property>
+    <property name="title"></property>
     <property name="resizable">0</property>
     <property name="type_hint">dialog</property>
     <property name="skip_taskbar_hint">1</property>