[vala-extra-vapis] libgsasl: Fix the bindings for gsasl_client_start / gsasl_server_start

[Rico Tzschichholz <ricotz src gnome org>]

commit e4e5a4eb02d9a647dadffe1c95160f3dc3bfb950
Author: Jelmer Vernooij <jelmer google com>
Date:   Tue Jan 29 20:15:43 2019 +0000

    libgsasl: Fix the bindings for gsasl_client_start / gsasl_server_start
    
    Prevent double free of GSasl_Session objects.

 libgsasl.vapi | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)
---
diff --git a/libgsasl.vapi b/libgsasl.vapi
index 6cb3e9a..723d221 100644
--- a/libgsasl.vapi
+++ b/libgsasl.vapi
@@ -121,7 +121,8 @@ namespace Gsasl {
                ALLOW_UNASSIGNED
        }
 
-       [Compact, CCode (cname = "Gsasl", lower_case_cprefix = "gsasl_", destroy_function = "gsasl_done")]
+       [Compact]
+       [CCode (cname = "Gsasl", lower_case_cprefix = "gsasl_", free_function = "gsasl_done", 
has_copy_function = false)]
        public class Context {
                private Context ();
                public static Gsasl.Result init (out Gsasl.Context ctx);
@@ -146,15 +147,13 @@ namespace Gsasl {
                public Gsasl.Result server_mechlist (out string mechlist);
                public Gsasl.Result server_support_p (string name);
 
-               public Gsasl.Result client_start (string mech);
-               public Gsasl.Result server_start ();
+               public Gsasl.Result client_start (string mech, out Session? session);
+               public Gsasl.Result server_start (string mech, out Session? session);
        }
 
-       [CCode (cname = "Gsasl_session", lower_case_cprefix = "gsasl_", destroy_function = "gsasl_finish")]
-       public struct Session {
-               [CCode (cname = "gsasl_client_start", instance_pos = -1)]
-               public Session (Gsasl.Context context, string mech);
-
+       [Compact]
+       [CCode (cname = "Gsasl_session", lower_case_cprefix = "gsasl_", free_function = "gsasl_finish", 
has_copy_function = false)]
+       public class Session {
                public void* hook {
                        [CCode (cname = "gsasl_session_hook_set")] get;
                        [CCode (cname = "gsasl_session_hook_get")] set;
@@ -174,7 +173,7 @@ namespace Gsasl {
                public unowned string get_property_fast (Gsasl.Property prop);
 
                public Gsasl.Result step ([CCode (array_length_type = "size_t")] uint[] input, [CCode 
(array_length_type = "size_t")] out uint8[] output);
-               public Gsasl.Result step64 (string b64input, out string b64output);
+               public Gsasl.Result step64 (string? b64input, out string b64output);
 
                public Gsasl.Result encode ([CCode (array_length_type = "size_t")] uint8[] input, [CCode 
(array_length_type = "size_t")] out uint8[] output);
                public Gsasl.Result decode ([CCode (array_length_type = "size_t")] uint8[] input, [CCode 
(array_length_type = "size_t")] out uint8[] output);