[devhelp/wip/swilmet/various-code-improvements: 2/2] book-tree: add some internal checks

[Sébastien Wilmet <swilmet src gnome org>]

commit 9800cf6473181b48d0dee7bcaf49356e2c48b1d5
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Nov 11 20:47:28 2015 +0100

    book-tree: add some internal checks

 src/dh-book-tree.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/dh-book-tree.c b/src/dh-book-tree.c
index 33d5599..2d331fb 100644
--- a/src/dh-book-tree.c
+++ b/src/dh-book-tree.c
@@ -611,7 +611,6 @@ book_tree_init_selection (DhBookTree *tree)
         GtkTreeSelection *selection;
         GtkTreeIter       iter;
         gboolean          iter_found = FALSE;
-        DhLink           *link;
 
         priv = dh_book_tree_get_instance_private (tree);
 
@@ -643,12 +642,18 @@ book_tree_init_selection (DhBookTree *tree)
         }
 
         if (iter_found) {
+                DhLink *link;
+
                 gtk_tree_model_get (GTK_TREE_MODEL (priv->store),
                                     &iter,
                                     COL_LINK, &link,
                                     -1);
+
                 priv->selected_link = link;
                 gtk_tree_selection_select_iter (selection, &iter);
+
+                if (dh_link_get_link_type (link) != DH_LINK_TYPE_BOOK)
+                        g_warn_if_reached ();
         }
 
         g_signal_handlers_unblock_by_func (selection,