[dia] Fix GtkVBox leak with integrated UI

[Hans Breuer <hans src gnome org>]

commit a18441810c9c901edce41070223f3e456617b8a9
Author: Hans Breuer <hans breuer org>
Date:   Sun May 20 19:33:57 2012 +0200

    Fix GtkVBox leak with integrated UI

 app/interface.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/app/interface.c b/app/interface.c
index 1767eeb..d09a42a 100644
--- a/app/interface.c
+++ b/app/interface.c
@@ -417,9 +417,6 @@ use_integrated_ui_for_display_shell(DDisplay *ddisp, char *title)
   /* Create a new tab page */
   ddisp->container = gtk_vbox_new(FALSE, 0);
 
-  /* Create a new tab page */
-  ddisp->container = gtk_vbox_new(FALSE, 0);
-
   /* <from GEdit> */
   /* don't allow focus on the close button */
   close_button = gtk_button_new();