Clean up some minor gcc warnings.
Clean up some minor gcc warnings.

cjcjameson/gpdb,xuegang/gpdb,rubikloud/gpdb,janebeckman/gpdb,foyzur/gpdb,yuanzhao/gpdb,zeroae/postgres-xl,rvs/gpdb,tpostgres-projects/tPostgres,yuanzhao/gpdb,randomtask1155/gpdb,50wu/gpdb,kaknikhil/gpdb,postmind-net/postgres-xl,lisakowen/gpdb,ahachete/gpdb,ashwinstar/gpdb,foyzur/gpdb,jmcatamney/gpdb,atris/gpdb,atris/gpdb,randomtask1155/gpdb,royc1/gpdb,jmcatamney/gpdb,rubikloud/gpdb,50wu/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,ashwinstar/gpdb,kmjungersen/PostgresXL,edespino/gpdb,rubikloud/gpdb,snaga/postgres-xl,ashwinstar/gpdb,randomtask1155/gpdb,tangp3/gpdb,snaga/postgres-xl,tangp3/gpdb,janebeckman/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,zaksoup/gpdb,xinzweb/gpdb,Chibin/gpdb,lintzc/gpdb,postmind-net/postgres-xl,chrishajas/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,oberstet/postgres-xl,snaga/postgres-xl,yazun/postgres-xl,randomtask1155/gpdb,tpostgres-projects/tPostgres,Chibin/gpdb,arcivanov/postgres-xl,jmcatamney/gpdb,greenplum-db/gpdb,50wu/gpdb,royc1/gpdb,zeroae/postgres-xl,yazun/postgres-xl,foyzur/gpdb,chrishajas/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,postmind-net/postgres-xl,oberstet/postgres-xl,edespino/gpdb,zaksoup/gpdb,rvs/gpdb,foyzur/gpdb,foyzur/gpdb,Quikling/gpdb,tangp3/gpdb,lpetrov-pivotal/gpdb,adam8157/gpdb,xinzweb/gpdb,atris/gpdb,50wu/gpdb,Chibin/gpdb,0x0FFF/gpdb,arcivanov/postgres-xl,yuanzhao/gpdb,chrishajas/gpdb,kaknikhil/gpdb,Quikling/gpdb,xuegang/gpdb,pavanvd/postgres-xl,cjcjameson/gpdb,lpetrov-pivotal/gpdb,0x0FFF/gpdb,lisakowen/gpdb,CraigHarris/gpdb,royc1/gpdb,kmjungersen/PostgresXL,techdragon/Postgres-XL,lintzc/gpdb,cjcjameson/gpdb,Chibin/gpdb,arcivanov/postgres-xl,greenplum-db/gpdb,tangp3/gpdb,yuanzhao/gpdb,Postgres-XL/Postgres-XL,atris/gpdb,lisakowen/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL,postmind-net/postgres-xl,Chibin/gpdb,lintzc/gpdb,jmcatamney/gpdb,lpetrov-pivotal/gpdb,cjcjameson/gpdb,rubikloud/gpdb,foyzur/gpdb,rubikloud/gpdb,rvs/gpdb,yuanzhao/gpdb,ahachete/gpdb,xinzweb/gpdb,janebeckman/gpdb,xuegang/gpdb,edespino/gpdb,50wu/gpdb,kaknikhil/gpdb,50wu/gpdb,lintzc/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,adam8157/gpdb,kaknikhil/gpdb,xinzweb/gpdb,xuegang/gpdb,yazun/postgres-xl,rubikloud/gpdb,xuegang/gpdb,yazun/postgres-xl,greenplum-db/gpdb,rvs/gpdb,edespino/gpdb,oberstet/postgres-xl,lintzc/gpdb,zaksoup/gpdb,zeroae/postgres-xl,randomtask1155/gpdb,ahachete/gpdb,lintzc/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,ahachete/gpdb,xuegang/gpdb,chrishajas/gpdb,atris/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,ahachete/gpdb,rubikloud/gpdb,cjcjameson/gpdb,lisakowen/gpdb,edespino/gpdb,cjcjameson/gpdb,arcivanov/postgres-xl,ovr/postgres-xl,xinzweb/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,techdragon/Postgres-XL,lpetrov-pivotal/gpdb,CraigHarris/gpdb,janebeckman/gpdb,greenplum-db/gpdb,kmjungersen/PostgresXL,royc1/gpdb,edespino/gpdb,foyzur/gpdb,kaknikhil/gpdb,zaksoup/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,CraigHarris/gpdb,Quikling/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,ahachete/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,rubikloud/gpdb,lpetrov-pivotal/gpdb,royc1/gpdb,zaksoup/gpdb,yuanzhao/gpdb,xinzweb/gpdb,Quikling/gpdb,edespino/gpdb,techdragon/Postgres-XL,yuanzhao/gpdb,adam8157/gpdb,atris/gpdb,ahachete/gpdb,techdragon/Postgres-XL,janebeckman/gpdb,Postgres-XL/Postgres-XL,tangp3/gpdb,pavanvd/postgres-xl,pavanvd/postgres-xl,greenplum-db/gpdb,chrishajas/gpdb,lisakowen/gpdb,xuegang/gpdb,oberstet/postgres-xl,randomtask1155/gpdb,50wu/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,Quikling/gpdb,lpetrov-pivotal/gpdb,tpostgres-projects/tPostgres,jmcatamney/gpdb,janebeckman/gpdb,rvs/gpdb,tpostgres-projects/tPostgres,foyzur/gpdb,adam8157/gpdb,0x0FFF/gpdb,zaksoup/gpdb,rvs/gpdb,chrishajas/gpdb,zeroae/postgres-xl,janebeckman/gpdb,janebeckman/gpdb,edespino/gpdb,adam8157/gpdb,techdragon/Postgres-XL,arcivanov/postgres-xl,adam8157/gpdb,lintzc/gpdb,0x0FFF/gpdb,chrishajas/gpdb,lintzc/gpdb,Quikling/gpdb,royc1/gpdb,royc1/gpdb,yuanzhao/gpdb,ovr/postgres-xl,ovr/postgres-xl,rvs/gpdb,tpostgres-projects/tPostgres,cjcjameson/gpdb,snaga/postgres-xl,lisakowen/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,Quikling/gpdb,tangp3/gpdb,yazun/postgres-xl,chrishajas/gpdb,CraigHarris/gpdb,randomtask1155/gpdb,ashwinstar/gpdb,pavanvd/postgres-xl,tangp3/gpdb,ashwinstar/gpdb,Postgres-XL/Postgres-XL,xinzweb/gpdb,zaksoup/gpdb,0x0FFF/gpdb,0x0FFF/gpdb,xuegang/gpdb,rvs/gpdb,lintzc/gpdb,Chibin/gpdb,rvs/gpdb,kaknikhil/gpdb,ashwinstar/gpdb,ovr/postgres-xl,rvs/gpdb,Chibin/gpdb,Quikling/gpdb,zeroae/postgres-xl,CraigHarris/gpdb,kmjungersen/PostgresXL,ahachete/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,xinzweb/gpdb,zaksoup/gpdb,xuegang/gpdb,atris/gpdb,Quikling/gpdb,kaknikhil/gpdb,Chibin/gpdb,edespino/gpdb,janebeckman/gpdb,jmcatamney/gpdb,Postgres-XL/Postgres-XL,Quikling/gpdb,tangp3/gpdb,edespino/gpdb,Chibin/gpdb,adam8157/gpdb,kaknikhil/gpdb,snaga/postgres-xl,atris/gpdb,50wu/gpdb,arcivanov/postgres-xl,royc1/gpdb,jmcatamney/gpdb,postmind-net/postgres-xl,lisakowen/gpdb