Remove compile warnings for lo dump by casting to char *.
Remove compile warnings for lo dump by casting to char *.

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