qapi: Change data type of the FOO_lookup generated for enum FOO

Currently, a FOO_lookup is an array of strings terminated by a NULL
sentinel.

A future patch will generate enums with "holes".  NULL-termination
will cease to work then.

To prepare for that, store the length in the FOO_lookup by wrapping it
in a struct and adding a member for the length.

The sentinel will be dropped next.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170822132255.23945-13-marcandre.lureau@redhat.com>
[Basically redone]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1503564371-26090-16-git-send-email-armbru@redhat.com>
[Rebased]

1 files changed, 1 insertions, 1 deletions

diff --git a/block.c b/block.c
index 845eff8177..b749bd6404 100644
--- a/block.c
+++ b/block.c
@@ -1332,7 +1332,7 @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file,
     detect_zeroes = qemu_opt_get(opts, "detect-zeroes");
     if (detect_zeroes) {
         BlockdevDetectZeroesOptions value =
-            qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
+            qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup,
                             detect_zeroes,
                             BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
                             &local_err);