commander: Silence expected deprecation warnings

We have to use the deprecated API because it is the only way to fetch
the correct information from menus that were themselves created with
that deprecated API, so we don't care about deprecation here.

Closes geany#865

commander/src/commander-plugin.c

@@ -306,6 +306,9 @@ store_populate_menu_items (GtkListStore  *store,
       gboolean      use_underline;
       GtkStockItem  item;
 
+      /* GtkStock is deprectaed since GTK 3.10, but we have to use it in order
+       * to get the actual label of the menu item */
+      G_GNUC_BEGIN_IGNORE_DEPRECATIONS
       if (GTK_IS_IMAGE_MENU_ITEM (node->data) &&
           gtk_image_menu_item_get_use_stock (node->data) &&
           gtk_stock_lookup (gtk_menu_item_get_label (node->data), &item)) {
@@ -315,6 +318,7 @@ store_populate_menu_items (GtkListStore  *store,
         item_label = g_strdup (gtk_menu_item_get_label (node->data));
         use_underline = gtk_menu_item_get_use_underline (node->data);
       }
+      G_GNUC_END_IGNORE_DEPRECATIONS
 
       /* remove underlines */
       if (use_underline) {