pgsql: Fix pg_dump on win32 to properly dump files larger than 2Gb when

Log Message:
-----------
Fix pg_dump on win32 to properly dump files larger than 2Gb when using
binary dump formats.

Modified Files:
--------------
pgsql/src/bin/pg_dump:
pg_backup_archiver.c (r1.141 -> r1.142)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.c.diff?r1=1.141&r2=1.142)
pg_backup_archiver.h (r1.74 -> r1.75)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.h.diff?r1=1.74&r2=1.75)
pg_backup_custom.c (r1.36 -> r1.37)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_custom.c.diff?r1=1.36&r2=1.37)
pg_backup_files.c (r1.30 -> r1.31)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_files.c.diff?r1=1.30&r2=1.31)
pg_backup_tar.c (r1.56 -> r1.57)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_tar.c.diff?r1=1.56&r2=1.57)
pg_dump.h (r1.132 -> r1.133)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_dump.h.diff?r1=1.132&r2=1.133)