[devhelp] BookTree: better specify columns when calling gtk_tree_store_new()

[Sébastien Wilmet <swilmet src gnome org>]

commit 95915be3b42aff53ba7f972dd26ca9ba84f25a85
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri May 5 13:30:58 2017 +0200

    BookTree: better specify columns when calling gtk_tree_store_new()

 src/dh-book-tree.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/dh-book-tree.c b/src/dh-book-tree.c
index 9af6971..66ea9d2 100644
--- a/src/dh-book-tree.c
+++ b/src/dh-book-tree.c
@@ -646,9 +646,9 @@ dh_book_tree_init (DhBookTree *tree)
         priv = dh_book_tree_get_instance_private (tree);
 
         priv->store = gtk_tree_store_new (N_COLUMNS,
-                                          G_TYPE_STRING,
-                                          G_TYPE_POINTER,
-                                          G_TYPE_OBJECT,
+                                          G_TYPE_STRING, /* Title */
+                                          G_TYPE_POINTER, /* DhLink */
+                                          DH_TYPE_BOOK,
                                           PANGO_TYPE_WEIGHT,
                                           PANGO_TYPE_UNDERLINE);
         priv->selected_link = NULL;