pgsql: Fix a race condition that caused pg_database_size() and - Mailing list pgsql-committers

Log Message:
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Fix a race condition that caused pg_database_size() and pg_tablespace_size()
to fail if an object was removed between calls to ReadDir() and stat().
Per discussion in pgsql-hackers.

http://archives.postgresql.org/pgsql-hackers/2007-03/msg00671.php

Bug report and patch by Michael Fuhr.

Modified Files:
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    pgsql/src/backend/utils/adt:
        dbsize.c (r1.11 -> r1.12)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/dbsize.c.diff?r1=1.11&r2=1.12)