[devhelp/wip/book-manager-singleton] BookTree: more precise return type for new()

[Sébastien Wilmet <swilmet src gnome org>]

commit 0c1d65b2a5b818c000c28f777caf8a64bc18d11d
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon May 1 17:03:20 2017 +0200

    BookTree: more precise return type for new()
    
    The DhBookManager parameter has anyway been removed, so there has
    already been an API break for this function.

 src/dh-book-tree.c |    8 ++++----
 src/dh-book-tree.h |    2 +-
 src/dh-sidebar.c   |    2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/src/dh-book-tree.c b/src/dh-book-tree.c
index 7b81d7f..26c4f78 100644
--- a/src/dh-book-tree.c
+++ b/src/dh-book-tree.c
@@ -703,12 +703,12 @@ dh_book_tree_init (DhBookTree *tree)
  *
  * Returns: (transfer floating): a new #DhBookTree widget.
  */
-GtkWidget *
+DhBookTree *
 dh_book_tree_new (void)
 {
-        return GTK_WIDGET (g_object_new (DH_TYPE_BOOK_TREE,
-                                         "enable-search", FALSE,
-                                         NULL));
+        return g_object_new (DH_TYPE_BOOK_TREE,
+                             "enable-search", FALSE,
+                             NULL);
 }
 
 static gboolean
diff --git a/src/dh-book-tree.h b/src/dh-book-tree.h
index 6369e40..cdfaf45 100644
--- a/src/dh-book-tree.h
+++ b/src/dh-book-tree.h
@@ -42,7 +42,7 @@ struct _DhBookTreeClass {
 };
 
 GType        dh_book_tree_get_type          (void) G_GNUC_CONST;
-GtkWidget *  dh_book_tree_new               (void);
+DhBookTree * dh_book_tree_new               (void);
 void         dh_book_tree_select_uri        (DhBookTree    *tree,
                                              const gchar   *uri);
 DhLink      *dh_book_tree_get_selected_book (DhBookTree    *tree);
diff --git a/src/dh-sidebar.c b/src/dh-sidebar.c
index 095f7d3..2c279df 100644
--- a/src/dh-sidebar.c
+++ b/src/dh-sidebar.c
@@ -659,7 +659,7 @@ dh_sidebar_constructed (GObject *object)
                                  sidebar,
                                  0);
 
-        priv->book_tree = DH_BOOK_TREE (dh_book_tree_new ());
+        priv->book_tree = dh_book_tree_new ();
         gtk_widget_show (GTK_WIDGET (priv->book_tree));
         g_signal_connect (priv->book_tree,
                           "link-selected",