Fix error message on DECLARE CURSOR ... SELECT INTO.
Fix error message on DECLARE CURSOR ... SELECT INTO.

The error message was changed accidentally in commit 78b0a42ec1. Probably
a copy-paste mistake. Change it back.

edespino/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,lisakowen/gpdb,edespino/gpdb,lisakowen/gpdb,edespino/gpdb,jmcatamney/gpdb,adam8157/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,edespino/gpdb,jmcatamney/gpdb,Chibin/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,Chibin/gpdb,Chibin/gpdb,greenplum-db/gpdb,xinzweb/gpdb,Chibin/gpdb,lisakowen/gpdb,adam8157/gpdb,Chibin/gpdb,ashwinstar/gpdb,xinzweb/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,Chibin/gpdb,xinzweb/gpdb,edespino/gpdb,xinzweb/gpdb,Chibin/gpdb,lisakowen/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,adam8157/gpdb,50wu/gpdb,Chibin/gpdb,ashwinstar/gpdb,50wu/gpdb,adam8157/gpdb,xinzweb/gpdb,lisakowen/gpdb,greenplum-db/gpdb,edespino/gpdb,50wu/gpdb,ashwinstar/gpdb,edespino/gpdb,ashwinstar/gpdb,lisakowen/gpdb,adam8157/gpdb,greenplum-db/gpdb,Chibin/gpdb,yuanzhao/gpdb,lisakowen/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,lisakowen/gpdb,jmcatamney/gpdb,50wu/gpdb,jmcatamney/gpdb,50wu/gpdb,50wu/gpdb,adam8157/gpdb,edespino/gpdb,edespino/gpdb,greenplum-db/gpdb,50wu/gpdb,edespino/gpdb,adam8157/gpdb,adam8157/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,xinzweb/gpdb,50wu/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,xinzweb/gpdb,Chibin/gpdb,greenplum-db/gpdb,xinzweb/gpdb