DEFINE_EVENT_TYPE(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED)
 DEFINE_EVENT_TYPE(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGING)
 
-//-----------------------------------------------------------------------------
-// idle system
-//-----------------------------------------------------------------------------
-
-extern void wxapp_install_idle_handler();
-extern bool g_isIdle;
-
 //-----------------------------------------------------------------------------
 // data
 //-----------------------------------------------------------------------------
     size_t i = 0;
 
     GtkNotebook * notebook = GTK_NOTEBOOK(m_widget);
-    if (gtk_notebook_get_scrollable(notebook));
+    if (gtk_notebook_get_scrollable(notebook))
         i = g_list_position( notebook->children, notebook->first_tab );
 
     for ( ; i < count; i++ )