Fix some more 'variable may be used uninitialized' warnings from gcc 4.4.
Fix some more 'variable may be used uninitialized' warnings from gcc 4.4.

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