[vala/0.38] json-glib-1.0: Mark return-type of gvariant_deserialize*() as nullable

[Rico Tzschichholz <ricotz src gnome org>]

commit 93c7300f67854d767154baeb0743dc71716c7a9a
Author: David Hewitt <davidmhewitt gmail com>
Date:   Sat Apr 14 19:18:22 2018 +0100

    json-glib-1.0: Mark return-type of gvariant_deserialize*() as nullable
    
    https://bugzilla.gnome.org/show_bug.cgi?id=795265

 vapi/json-glib-1.0.vapi         |    4 ++--
 vapi/metadata/Json-1.0.metadata |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/vapi/json-glib-1.0.vapi b/vapi/json-glib-1.0.vapi
index 38e1d6d..825d0f6 100644
--- a/vapi/json-glib-1.0.vapi
+++ b/vapi/json-glib-1.0.vapi
@@ -429,10 +429,10 @@ namespace Json {
        public static string gobject_to_data (GLib.Object gobject, out size_t length);
        [CCode (cheader_filename = "json-glib/json-glib.h", returns_floating_reference = true)]
        [Version (since = "0.14")]
-       public static GLib.Variant gvariant_deserialize (Json.Node json_node, string? signature) throws 
GLib.Error;
+       public static GLib.Variant? gvariant_deserialize (Json.Node json_node, string? signature) throws 
GLib.Error;
        [CCode (cheader_filename = "json-glib/json-glib.h", returns_floating_reference = true)]
        [Version (since = "0.14")]
-       public static GLib.Variant gvariant_deserialize_data (string json, ssize_t length, string? signature) 
throws GLib.Error;
+       public static GLib.Variant? gvariant_deserialize_data (string json, ssize_t length, string? 
signature) throws GLib.Error;
        [CCode (cheader_filename = "json-glib/json-glib.h")]
        [Version (since = "0.14")]
        public static Json.Node gvariant_serialize (GLib.Variant variant);
diff --git a/vapi/metadata/Json-1.0.metadata b/vapi/metadata/Json-1.0.metadata
index 1994116..79df8a0 100644
--- a/vapi/metadata/Json-1.0.metadata
+++ b/vapi/metadata/Json-1.0.metadata
@@ -21,8 +21,8 @@ boxed_register_serialize_func skip=false
 boxed_register_deserialize_func skip=false
 
 // Floating references
-gvariant_deserialize unowned=false floating
-gvariant_deserialize_data unowned=false floating
+gvariant_deserialize unowned=false nullable floating
+gvariant_deserialize_data unowned=false nullable floating
 
 Object.add_member replacement="Json.Object.set_member"
 Serializable cheader_filename="json-glib/json-glib.h,json-glib/json-gobject.h"