[devhelp] book: fix leaked strings

[Aleksander Morgado <aleksm src gnome org>]

commit 0643cfad28df43e80e55d7f81cc2165810ec72b2
Author: Pavel Vasin <rat4vier gmail com>
Date:   Sat Dec 1 12:40:37 2012 +0400

    book: fix leaked strings

 src/dh-book.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/dh-book.c b/src/dh-book.c
index 511a412..afc6c38 100644
--- a/src/dh-book.c
+++ b/src/dh-book.c
@@ -126,8 +126,12 @@ book_finalize (GObject *object)
                 g_object_unref (priv->monitor);
         }
 
+        g_free (priv->language);
+
         g_free (priv->title);
 
+        g_free (priv->name);
+
         g_free (priv->path);
 
         G_OBJECT_CLASS (dh_book_parent_class)->finalize (object);