qapi: Separate type QNull from QObject

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/include/qapi/qmp/qobject.h b/include/qapi/qmp/qobject.h
index b8ddbca405..3543b552f4 100644
--- a/include/qapi/qmp/qobject.h
+++ b/include/qapi/qmp/qobject.h
@@ -93,11 +93,15 @@ static inline QType qobject_type(const QObject *obj)
     return obj->type;
 }
 
-extern QObject qnull_;
+typedef struct QNull {
+    QObject base;
+} QNull;
 
-static inline QObject *qnull(void)
+extern QNull qnull_;
+
+static inline QNull *qnull(void)
 {
-    qobject_incref(&qnull_);
+    QINCREF(&qnull_);
     return &qnull_;
 }