qapi: Introduce a first class 'null' type

I expect the 'null' type to be useful mostly for members of alternate
types.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 7b0d4e7e05..39bc8351a3 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -89,6 +89,7 @@ typedef struct QEMUSGList QEMUSGList;
 typedef struct QEMUTimer QEMUTimer;
 typedef struct QEMUTimerListGroup QEMUTimerListGroup;
 typedef struct QObject QObject;
+typedef struct QNull QNull;
 typedef struct RAMBlock RAMBlock;
 typedef struct Range Range;
 typedef struct SerialState SerialState;