[gtk+] Fix the doc tools build

[Matthias Clasen <matthiasc src gnome org>]

commit 2218020db95ad3f80ef39a9cd6f516de0f968023
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Dec 1 09:43:52 2017 -0500

    Fix the doc tools build

 docs/tools/widgets.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/tools/widgets.c b/docs/tools/widgets.c
index 8e86962..9670edb 100644
--- a/docs/tools/widgets.c
+++ b/docs/tools/widgets.c
@@ -1237,7 +1237,7 @@ create_headerbar (void)
   gtk_header_bar_set_subtitle (GTK_HEADER_BAR (bar), "(subtitle)");
   gtk_window_set_titlebar (GTK_WINDOW (window), bar);
   button = gtk_button_new ();
-  gtk_container_add (GTK_CONTAINER (button), gtk_image_new_from_icon_name ("bookmark-new-symbolic", 
GTK_ICON_SIZE_BUTTON));
+  gtk_container_add (GTK_CONTAINER (button), gtk_image_new_from_icon_name ("bookmark-new-symbolic"));
   gtk_header_bar_pack_end (GTK_HEADER_BAR (bar), button);
 
   return new_widget_info ("headerbar", window, ASIS);