DROP OWNED BY is broken on master branch.

Hi All,

Consider the below test:

postgres@53130=#create role test WITH login createdb;
CREATE ROLE
postgres@53130=#\c - test
You are now connected to database "postgres" as user "test".
postgres@53150=#create database test;
CREATE DATABASE
postgres@53150=#\c - rushabh
You are now connected to database "postgres" as user "rushabh".
postgres@53162=#
postgres@53162=#
-- This was working before the below mentioned commit.
postgres@53162=#drop owned by test;
ERROR:  global objects cannot be deleted by doDeletion

Commit 6566133c5f52771198aca07ed18f84519fac1be7 ensure that
pg_auth_members.grantor is always valid.  This commit did changes
into shdepDropOwned() function and combined the SHARED_DEPENDENCY_ACL
and SHARED_DEPENDENCY_OWNER.  In that process it removed condition for
local object in owner dependency.

                case SHARED_DEPENDENCY_OWNER:
-                   /* If a local object, save it for deletion below */
-                   if (sdepForm->dbid == MyDatabaseId)
+                   /* Save it for deletion below */

Case ending up with above error because of the above removed condition.

Please find the attached patch which fixes the case.

Thanks,
Rushabh Lathia
www.EnterpriseDB.com