[evince/outline-collapse-all] Use a constant for GString init size

[Nelson Ben <nbenitez src gnome org>]

commit 651fdbcdd877ef6bf42c5805d1d7b5d68fad2389
Author: Nelson Benítez León <nbenitezl gmail com>
Date:   Fri Jun 25 21:34:03 2021 -0400

    Use a constant for GString init size

 shell/ev-sidebar-links.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/shell/ev-sidebar-links.c b/shell/ev-sidebar-links.c
index 35da7801..0081562b 100644
--- a/shell/ev-sidebar-links.c
+++ b/shell/ev-sidebar-links.c
@@ -35,6 +35,8 @@
 #include "ev-sidebar-page.h"
 #include "ev-window.h"
 
+#define GSTRING_INIT_SIZE 4096
+
 struct _EvSidebarLinksPrivate {
        GtkWidget *tree_view;
 
@@ -858,7 +860,7 @@ collapse_all_cb (GtkWidget *menuitem, EvSidebarLinks *sidebar_links)
                metadata = ev_window_get_metadata (EV_WINDOW (window));
                if (metadata) {
                        ev_metadata_set_string (metadata, "index-expand", "");
-                       index_collapse = g_string_sized_new (4096);
+                       index_collapse = g_string_sized_new (GSTRING_INIT_SIZE);
                        g_string_append (index_collapse, "|");
                }
        }
@@ -941,7 +943,7 @@ expand_all_cb (GtkWidget *menuitem, EvSidebarLinks *sidebar_links)
                metadata = ev_window_get_metadata (EV_WINDOW (window));
                if (metadata) {
                        ev_metadata_set_string (metadata, "index-collapse", "");
-                       index_expand = g_string_sized_new (4096);
+                       index_expand = g_string_sized_new (GSTRING_INIT_SIZE);
                        g_string_append (index_expand, "|");
                }
        }