qobject: Use 'bool' for qbool

We require a C99 compiler, so let's use 'bool' instead of 'int'
when dealing with boolean values.  There are few enough clients
to fix them all in one pass.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/qapi/qmp-output-visitor.c b/qapi/qmp-output-visitor.c
index 96b3384..7e0f7ce 100644
--- a/qapi/qmp-output-visitor.c
+++ b/qapi/qmp-output-visitor.c
@@ -166,7 +166,7 @@
                                  Error **errp)
 {
     QmpOutputVisitor *qov = to_qov(v);
-    qmp_output_add(qov, name, qbool_from_int(*obj));
+    qmp_output_add(qov, name, qbool_from_bool(*obj));
 }
 
 static void qmp_output_type_str(Visitor *v, char **obj, const char *name,