[gtk+] Fix use_alpha initialization and propagation

[Matthias Clasen <matthiasc src gnome org>]

commit 7f44feab194c512e81ae263d09e65869d54c0fc4
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Feb 8 20:21:10 2012 -0500

    Fix use_alpha initialization and propagation
    
    We must set use_alpha to TRUE initially, and when passing it
    down to the swatches, we must iterate over the custom box, too.

 gtk/gtkcolorchooserwidget.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcolorchooserwidget.c b/gtk/gtkcolorchooserwidget.c
index 10d29c2..dc48c18 100644
--- a/gtk/gtkcolorchooserwidget.c
+++ b/gtk/gtkcolorchooserwidget.c
@@ -224,7 +224,7 @@ gtk_color_chooser_widget_set_use_alpha (GtkColorChooserWidget *cc,
     {
       grid = p->data;
 
-      if (!GTK_IS_GRID (grid))
+      if (!GTK_IS_CONTAINER (grid))
         continue;
 
       children = gtk_container_get_children (GTK_CONTAINER (grid));
@@ -399,6 +399,8 @@ gtk_color_chooser_widget_init (GtkColorChooserWidget *cc)
 
   cc->priv = G_TYPE_INSTANCE_GET_PRIVATE (cc, GTK_TYPE_COLOR_CHOOSER_WIDGET, GtkColorChooserWidgetPrivate);
 
+  cc->priv->use_alpha = TRUE;
+
   gtk_orientable_set_orientation (GTK_ORIENTABLE (cc), GTK_ORIENTATION_VERTICAL);
   cc->priv->palette = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
   gtk_container_add (GTK_CONTAINER (cc), cc->priv->palette);