Silence compiler warning about pointer type mismatch on some platforms.
Silence compiler warning about pointer type mismatch on some platforms.

timeval.t_sec is of type time_t, which is not always compatible with long.
I'm not sure if this was just harmless warning or a real bug, but this
fixes it, anyway.

jmcatamney/gpdb,lisakowen/gpdb,Postgres-XL/Postgres-XL,oberstet/postgres-xl,xinzweb/gpdb,oberstet/postgres-xl,pavanvd/postgres-xl,yazun/postgres-xl,50wu/gpdb,zeroae/postgres-xl,zeroae/postgres-xl,50wu/gpdb,adam8157/gpdb,adam8157/gpdb,lisakowen/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL,greenplum-db/gpdb,lisakowen/gpdb,xinzweb/gpdb,adam8157/gpdb,xinzweb/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL,50wu/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,xinzweb/gpdb,techdragon/Postgres-XL,50wu/gpdb,jmcatamney/gpdb,yazun/postgres-xl,ovr/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,yazun/postgres-xl,adam8157/gpdb,ovr/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,xinzweb/gpdb,50wu/gpdb,pavanvd/postgres-xl,jmcatamney/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,50wu/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,jmcatamney/gpdb,50wu/gpdb,lisakowen/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,xinzweb/gpdb,adam8157/gpdb,lisakowen/gpdb,zeroae/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,xinzweb/gpdb,pavanvd/postgres-xl,adam8157/gpdb,yazun/postgres-xl,adam8157/gpdb,zeroae/postgres-xl,yazun/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,zeroae/postgres-xl,greenplum-db/gpdb,techdragon/Postgres-XL,greenplum-db/gpdb,ovr/postgres-xl,jmcatamney/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,adam8157/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,50wu/gpdb,oberstet/postgres-xl