Revert "revert 630f5ba2a693d0a6a9b3ebced645dfd4c5046c98"

This reverts commit f61652fc24.

gnucash/gnome-utils/gnc-plugin-page.c

@@ -107,36 +107,6 @@ typedef struct _GncPluginPagePrivate
 #define GNC_PLUGIN_PAGE_GET_PRIVATE(o)  \
    (G_TYPE_INSTANCE_GET_PRIVATE ((o), GNC_TYPE_PLUGIN_PAGE, GncPluginPagePrivate))
 
-GType
-gnc_plugin_page_get_type (void)
-{
-    static GType gnc_plugin_page_type = 0;
-
-    if (gnc_plugin_page_type == 0)
-    {
-        static const GTypeInfo our_info =
-        {
-
-            sizeof (GncPluginPageClass),
-            NULL,		/* base_init */
-            NULL,		/* base_finalize */
-            (GClassInitFunc) gnc_plugin_page_class_init,
-            NULL,		/* class_finalize */
-            NULL,		/* class_data */
-            sizeof (GncPluginPage),
-            0,		/* n_preallocs */
-            (GInstanceInitFunc) gnc_plugin_page_init,
-        };
-
-        gnc_plugin_page_type = g_type_register_static (G_TYPE_OBJECT,
-                               "GncPluginPage",
-                               &our_info, 0);
-    }
-
-    return gnc_plugin_page_type;
-}
-
-
 /*  Create the display widget that corresponds to this plugin.  This
  *  function will be called by the main/embedded window manipulation
  *  code to create a widget that they can display.  The returned
@@ -379,6 +349,7 @@ gnc_plugin_page_unselected (GncPluginPage *plugin_page)
     g_signal_emit (G_OBJECT (plugin_page), signals[UNSELECTED], 0);
 }
 
+G_DEFINE_TYPE_WITH_PRIVATE(GncPluginPage, gnc_plugin_page, G_TYPE_OBJECT)
 
 /** Initialize the class for a new generic plugin page.  This will set
  *  up any function pointers that override functions in the parent
@@ -400,8 +371,6 @@ gnc_plugin_page_class_init (GncPluginPageClass *klass)
     klass->tab_icon    = NULL;
     klass->plugin_name = NULL;
 
-    g_type_class_add_private(klass, sizeof(GncPluginPagePrivate));
-
     g_object_class_install_property
     (gobject_class,
      PROP_PAGE_NAME,