pgsql: Fix storage of getopt() return, should be 'int', for pg_upgrade.

Log Message:
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Fix storage of getopt() return, should be 'int', for pg_upgrade.

Steve Singer

Modified Files:
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pgsql/contrib/pg_upgrade:
option.c (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_upgrade/option.c?r1=1.6&r2=1.7)