fix small memory free error.
fix small memory free error.

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