Log Message:
-----------
This patch will ensure that the hash table iteration performed by
AtCommit_Portals is restarted when a portal is deleted. This is
necessary since the deletion of a portal may cause the deletion of
another which on rare occations may cause the iterator to return a
deleted portal an thus a renewed attempt delete.

Thomas Hallgren

Modified Files:
--------------
    pgsql/src/backend/utils/mmgr:
        portalmem.c (r1.78 -> r1.79)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/portalmem.c.diff?r1=1.78&r2=1.79)

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