Simplify calls of pg_class_aclcheck when multiple modes are used

Hi all,

In a couple of code paths we do the following to check permissions on an
object:
if (pg_class_aclcheck(relid, userid, ACL_USAGE) != ACLCHECK_OK &&
pg_class_aclcheck(relid, userid, ACL_UPDATE) != ACLCHECK_OK)
ereport(ERROR, blah);

Wouldn't it be better to simplify that with a single call of
pg_class_aclcheck, gathering together the modes that need to be checked? In
the case above, the call to pg_class_aclcheck would become like that:
if (pg_class_aclcheck(relid, userid,
ACL_USAGE | ACL_UPDATE) != ACLCHECK_OK)
ereport(ERROR, blah);

That's not a critical thing, but it would save some cycles. Patch is
attached.
Regards,
--
Michael