[gtk/wip/matthiasc/shortcut-2] shortcutmanager: Fix the build with GLib < 2.64

[Matthias Clasen <matthiasc src gnome org>]

commit 5412f4b4b7d123f28a30d5576b9e8ec19a9073f5
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Mar 24 17:14:39 2020 -0400

    shortcutmanager: Fix the build with GLib < 2.64
    
    We don't have recent GLib in ci.

 gtk/gtkshortcutmanager.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkshortcutmanager.c b/gtk/gtkshortcutmanager.c
index 625e594d84..71a1b35eb1 100644
--- a/gtk/gtkshortcutmanager.c
+++ b/gtk/gtkshortcutmanager.c
@@ -109,8 +109,21 @@ gtk_shortcut_manager_default_remove_controller (GtkShortcutManager    *self,
       guint position;
 
       store = gtk_flatten_list_model_get_model (model); 
-      if (g_list_store_find (G_LIST_STORE (store), controller, &position))
+#if 0 && GLIB_CHECK_VERSION(2,64,0)
+      if (_g_list_store_find (G_LIST_STORE (store), controller, &position))
         g_list_store_remove (G_LIST_STORE (store), position);
+#else
+      for (position = 0; position < g_list_model_get_n_items (G_LIST_MODEL (store)); position++)
+        {
+          GtkShortcutController *item = g_list_model_get_item (G_LIST_MODEL (store), position);
+          g_object_unref (item);
+          if (item == controller)
+            {
+              g_list_store_remove (G_LIST_STORE (store), position);
+              break;
+            }
+        }
+#endif
     }
 }