Fixed very old NOT NULL add column which will cause problems with postgres 7.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@10820 b35dd754-fafc-0310-a699-88a17e54d16e

src/database/upgrade/1/openfire_postgresql.sql

@@ -29,7 +29,7 @@ CREATE TABLE jiveGroupUser (
 );
 
 -- mucRoom: Add new columns: "lockedDate" and "emptyDate". Rename column "invitationRequired" to "membersOnly". Delete columns: "lastActiveDate" and "inMemory".
-ALTER TABLE mucRoom ADD COLUMN lockedDate CHAR(15) NOT NULL;
+ALTER TABLE mucRoom ADD COLUMN lockedDate CHAR(15) NULL;
 ALTER TABLE mucRoom ADD COLUMN emptyDate CHAR(15) NULL;
 ALTER TABLE mucRoom RENAME COLUMN invitationRequired TO membersOnly;
 ALTER TABLE mucRoom DROP COLUMN lastActiveDate;