[seahorse] gkr-item: Make sure we don't escape NULL label

[Niels De Graef <nielsdg src gnome org>]

commit ebb3b8c6020995386f3624149c9f5b70a0a1fc99
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Fri Aug 20 14:55:29 2021 +0200

    gkr-item: Make sure we don't escape NULL label
    
    Normally, a `SecretItem` returning a NULL string for it's label property
    is a bug whatsoever. We don't want Seahorse to crash on that however
    (or to start spewing CRITICALs), so just make sure we pass an empty
    string if this happens.
    
    Fixes https://gitlab.gnome.org/GNOME/seahorse/-/issues/266

 gkr/gkr-item.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gkr/gkr-item.vala b/gkr/gkr-item.vala
index 79d31f41..def1c5b2 100644
--- a/gkr/gkr-item.vala
+++ b/gkr/gkr-item.vala
@@ -84,7 +84,7 @@ public class Item : Secret.Item, Deletable, Viewable {
         owned get {
             ensure_item_info ();
             var result = new StringBuilder("");
-            result.append(Markup.escape_text(this._info.label));
+            result.append(Markup.escape_text(this._info.label ?? ""));
             if (this._info.details != null && this._info.details != "") {
                 result.append("<span size='small' rise='0' foreground='#555555'>\n");
                 result.append(this._info.details);