Fix trigger example code to match header changes
Fix trigger example code to match header changes

I should have done this in b93f5a5673b4bb09e14eb80fe28aa21fc20a6271 but
didn't notice the problem at the time.

Per report from Marco Nenciarini

yazun/postgres-xl,lisakowen/gpdb,lisakowen/gpdb,kmjungersen/PostgresXL,postmind-net/postgres-xl,arcivanov/postgres-xl,ovr/postgres-xl,greenplum-db/gpdb,adam8157/gpdb,50wu/gpdb,lisakowen/gpdb,adam8157/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,adam8157/gpdb,ashwinstar/gpdb,Postgres-XL/Postgres-XL,yazun/postgres-xl,zeroae/postgres-xl,adam8157/gpdb,techdragon/Postgres-XL,oberstet/postgres-xl,greenplum-db/gpdb,oberstet/postgres-xl,techdragon/Postgres-XL,jmcatamney/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,50wu/gpdb,ashwinstar/gpdb,Postgres-XL/Postgres-XL,ashwinstar/gpdb,xinzweb/gpdb,greenplum-db/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,jmcatamney/gpdb,kmjungersen/PostgresXL,adam8157/gpdb,ashwinstar/gpdb,snaga/postgres-xl,pavanvd/postgres-xl,xinzweb/gpdb,snaga/postgres-xl,yazun/postgres-xl,snaga/postgres-xl,xinzweb/gpdb,tpostgres-projects/tPostgres,lisakowen/gpdb,tpostgres-projects/tPostgres,jmcatamney/gpdb,jmcatamney/gpdb,arcivanov/postgres-xl,greenplum-db/gpdb,lisakowen/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,Postgres-XL/Postgres-XL,greenplum-db/gpdb,pavanvd/postgres-xl,50wu/gpdb,xinzweb/gpdb,50wu/gpdb,Postgres-XL/Postgres-XL,kmjungersen/PostgresXL,lisakowen/gpdb,postmind-net/postgres-xl,lisakowen/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,ashwinstar/gpdb,ashwinstar/gpdb,pavanvd/postgres-xl,tpostgres-projects/tPostgres,snaga/postgres-xl,zeroae/postgres-xl,kmjungersen/PostgresXL,adam8157/gpdb,postmind-net/postgres-xl,oberstet/postgres-xl,xinzweb/gpdb,Postgres-XL/Postgres-XL,ovr/postgres-xl,yazun/postgres-xl,postmind-net/postgres-xl,50wu/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,adam8157/gpdb,oberstet/postgres-xl,ovr/postgres-xl,jmcatamney/gpdb,50wu/gpdb,zeroae/postgres-xl,arcivanov/postgres-xl,arcivanov/postgres-xl,xinzweb/gpdb,50wu/gpdb,zeroae/postgres-xl,yazun/postgres-xl,pavanvd/postgres-xl,ovr/postgres-xl,kmjungersen/PostgresXL,ovr/postgres-xl,50wu/gpdb,techdragon/Postgres-XL,jmcatamney/gpdb,snaga/postgres-xl,pavanvd/postgres-xl,oberstet/postgres-xl,lisakowen/gpdb,techdragon/Postgres-XL,greenplum-db/gpdb,jmcatamney/gpdb,postmind-net/postgres-xl