[libdazzle] multi-paned: fix initial state of multi paned

[Christian Hergert <chergert src gnome org>]

commit a4b478e8b1181038de76689097fb9445ad216dd5
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jun 21 15:56:24 2017 -0700

    multi-paned: fix initial state of multi paned
    
    We should have probably defaulted to horizontal since it is the zero state.
    But since we didn't, we need to set the initial value in our instance
    init function.

 src/widgets/dzl-multi-paned.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/widgets/dzl-multi-paned.c b/src/widgets/dzl-multi-paned.c
index 9101761..e167021 100644
--- a/src/widgets/dzl-multi-paned.c
+++ b/src/widgets/dzl-multi-paned.c
@@ -1926,7 +1926,7 @@ dzl_multi_paned_class_init (DzlMultiPanedClass *klass)
                        "Orientation",
                        GTK_TYPE_ORIENTATION,
                        GTK_ORIENTATION_VERTICAL,
-                       (G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
+                       (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 
   g_object_class_install_properties (object_class, N_PROPS, properties);
 
@@ -1975,6 +1975,7 @@ dzl_multi_paned_init (DzlMultiPaned *self)
 
   gtk_widget_set_has_window (GTK_WIDGET (self), FALSE);
 
+  priv->orientation = GTK_ORIENTATION_VERTICAL;
   priv->children = g_array_new (FALSE, TRUE, sizeof (DzlMultiPanedChild));
 
   dzl_multi_paned_create_pan_gesture (self);