[gtk+] gtk-demo: Fix the assistant example

[Matthias Clasen <matthiasc src gnome org>]

commit 1266c6d81a6a79e7e8a16c589b3a3c9ab06a4ffe
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Nov 17 19:48:02 2015 -0500

    gtk-demo: Fix the assistant example
    
    GtkEntry respects valign now, so we need to set it to something
    other than fill.

 demos/gtk-demo/assistant.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/demos/gtk-demo/assistant.c b/demos/gtk-demo/assistant.c
index 6b8a036..addf13c 100644
--- a/demos/gtk-demo/assistant.c
+++ b/demos/gtk-demo/assistant.c
@@ -101,6 +101,7 @@ create_page1 (GtkWidget *assistant)
 
   entry = gtk_entry_new ();
   gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
+  gtk_widget_set_valign (entry, GTK_ALIGN_CENTER);
   gtk_box_pack_start (GTK_BOX (box), entry, TRUE, TRUE, 0);
   g_signal_connect (G_OBJECT (entry), "changed",
                     G_CALLBACK (on_entry_changed), assistant);