[evolution-data-server] vala: Properly annotate CamelServiceAuthType

[Corentin Noël <corentinnoel src gnome org>]

commit 1f3a6460324e76348add9ae8d888cf55e7cf9ed5
Author: Corentin Noël <corentin noel collabora com>
Date:   Sun Jul 25 17:02:17 2021 +0200

    vala: Properly annotate CamelServiceAuthType
    
    Allows to use it to create a CamelSasl subclass.

 src/camel/camel-sasl.c         | 2 +-
 src/vala/Camel-1.2.metadata    | 4 +---
 src/vala/camel-1.2-custom.vala | 2 +-
 3 files changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/src/camel/camel-sasl.c b/src/camel/camel-sasl.c
index 0a09c5559..b3da1df3b 100644
--- a/src/camel/camel-sasl.c
+++ b/src/camel/camel-sasl.c
@@ -931,7 +931,7 @@ camel_sasl_authtype_list (gboolean include_plain)
  * camel_sasl_authtype:
  * @mechanism: the SASL mechanism to get an authtype for
  *
- * Returns: a #CamelServiceAuthType for the given mechanism, if
+ * Returns: (transfer none) (nullable): a #CamelServiceAuthType for the given mechanism, if
  * it is supported.
  **/
 CamelServiceAuthType *
diff --git a/src/vala/Camel-1.2.metadata b/src/vala/Camel-1.2.metadata
index 8c94ca7f2..365bc1295 100644
--- a/src/vala/Camel-1.2.metadata
+++ b/src/vala/Camel-1.2.metadata
@@ -145,9 +145,7 @@ VeeStore.get_unmatched_folder type="unowned Camel.VeeFolder"
 WeakRefGroup.get type="GLib.Object"
 WeakRefGroup.set.object type="owned GLib.Object"
 
-ServiceAuthType.authproto unowned=false
-ServiceAuthType.description unowned=false
-ServiceAuthType.name unowned=false
+ServiceAuthType struct
 
 // Abstract classes can't have creation methods
 Sasl.new symbol_type="function" name="for_service"
diff --git a/src/vala/camel-1.2-custom.vala b/src/vala/camel-1.2-custom.vala
index 76bbf0641..1a3d5b02c 100644
--- a/src/vala/camel-1.2-custom.vala
+++ b/src/vala/camel-1.2-custom.vala
@@ -5,6 +5,6 @@ namespace Camel {
        }
 
        public abstract class Sasl : GLib.Object {
-               public class Camel.ServiceAuthType auth_type;
+               public class weak Camel.ServiceAuthType? auth_type;
        }
 }