pgsql: Fix pg_restore to guard against unexpected EOF while reading an

Log Message:
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Fix pg_restore to guard against unexpected EOF while reading an archive file.
Per report and partial patch from Chad Wagner.

Tags:
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REL8_2_STABLE

Modified Files:
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    pgsql/src/bin/pg_dump:
        pg_backup_archiver.c (r1.138.2.1 -> r1.138.2.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.c.diff?r1=1.138.2.1&r2=1.138.2.2)
        pg_backup_custom.c (r1.36.2.1 -> r1.36.2.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_custom.c.diff?r1=1.36.2.1&r2=1.36.2.2)
        pg_backup_files.c (r1.29.2.1 -> r1.29.2.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_files.c.diff?r1=1.29.2.1&r2=1.29.2.2)
        pg_backup_tar.c (r1.56.2.1 -> r1.56.2.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_tar.c.diff?r1=1.56.2.1&r2=1.56.2.2)