Fix typo in header file comment
Fix typo in header file comment

lisakowen/gpdb,CraigHarris/gpdb,ahachete/gpdb,royc1/gpdb,rubikloud/gpdb,Quikling/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,Quikling/gpdb,kaknikhil/gpdb,atris/gpdb,xinzweb/gpdb,yuanzhao/gpdb,zaksoup/gpdb,ashwinstar/gpdb,rvs/gpdb,ahachete/gpdb,lpetrov-pivotal/gpdb,Quikling/gpdb,tangp3/gpdb,50wu/gpdb,zaksoup/gpdb,lisakowen/gpdb,ashwinstar/gpdb,50wu/gpdb,xinzweb/gpdb,foyzur/gpdb,adam8157/gpdb,xinzweb/gpdb,xinzweb/gpdb,janebeckman/gpdb,lintzc/gpdb,yuanzhao/gpdb,atris/gpdb,zaksoup/gpdb,janebeckman/gpdb,janebeckman/gpdb,Quikling/gpdb,xuegang/gpdb,greenplum-db/gpdb,edespino/gpdb,edespino/gpdb,janebeckman/gpdb,yuanzhao/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,CraigHarris/gpdb,royc1/gpdb,kaknikhil/gpdb,Chibin/gpdb,cjcjameson/gpdb,royc1/gpdb,royc1/gpdb,CraigHarris/gpdb,tangp3/gpdb,rubikloud/gpdb,edespino/gpdb,foyzur/gpdb,lintzc/gpdb,randomtask1155/gpdb,rubikloud/gpdb,lisakowen/gpdb,xuegang/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,xuegang/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,lintzc/gpdb,50wu/gpdb,xinzweb/gpdb,foyzur/gpdb,janebeckman/gpdb,ashwinstar/gpdb,royc1/gpdb,jmcatamney/gpdb,rubikloud/gpdb,lintzc/gpdb,xuegang/gpdb,rvs/gpdb,lpetrov-pivotal/gpdb,rubikloud/gpdb,lisakowen/gpdb,tangp3/gpdb,ahachete/gpdb,lintzc/gpdb,lisakowen/gpdb,0x0FFF/gpdb,edespino/gpdb,chrishajas/gpdb,ashwinstar/gpdb,edespino/gpdb,rvs/gpdb,Chibin/gpdb,cjcjameson/gpdb,randomtask1155/gpdb,jmcatamney/gpdb,Quikling/gpdb,zaksoup/gpdb,CraigHarris/gpdb,chrishajas/gpdb,zaksoup/gpdb,randomtask1155/gpdb,rvs/gpdb,lpetrov-pivotal/gpdb,jmcatamney/gpdb,foyzur/gpdb,janebeckman/gpdb,xuegang/gpdb,lisakowen/gpdb,kaknikhil/gpdb,greenplum-db/gpdb,Chibin/gpdb,xinzweb/gpdb,royc1/gpdb,ahachete/gpdb,adam8157/gpdb,0x0FFF/gpdb,adam8157/gpdb,cjcjameson/gpdb,50wu/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,chrishajas/gpdb,janebeckman/gpdb,cjcjameson/gpdb,foyzur/gpdb,atris/gpdb,yuanzhao/gpdb,randomtask1155/gpdb,zaksoup/gpdb,yuanzhao/gpdb,Quikling/gpdb,foyzur/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,adam8157/gpdb,lpetrov-pivotal/gpdb,CraigHarris/gpdb,foyzur/gpdb,ahachete/gpdb,kaknikhil/gpdb,ahachete/gpdb,edespino/gpdb,Quikling/gpdb,rvs/gpdb,randomtask1155/gpdb,atris/gpdb,janebeckman/gpdb,edespino/gpdb,cjcjameson/gpdb,0x0FFF/gpdb,rubikloud/gpdb,cjcjameson/gpdb,janebeckman/gpdb,chrishajas/gpdb,kaknikhil/gpdb,lisakowen/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,Chibin/gpdb,jmcatamney/gpdb,adam8157/gpdb,lisakowen/gpdb,greenplum-db/gpdb,lintzc/gpdb,atris/gpdb,zaksoup/gpdb,ashwinstar/gpdb,Quikling/gpdb,randomtask1155/gpdb,adam8157/gpdb,chrishajas/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,xinzweb/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,kaknikhil/gpdb,Chibin/gpdb,cjcjameson/gpdb,edespino/gpdb,chrishajas/gpdb,greenplum-db/gpdb,tangp3/gpdb,0x0FFF/gpdb,edespino/gpdb,royc1/gpdb,royc1/gpdb,yuanzhao/gpdb,rvs/gpdb,tangp3/gpdb,xuegang/gpdb,randomtask1155/gpdb,50wu/gpdb,randomtask1155/gpdb,Quikling/gpdb,0x0FFF/gpdb,atris/gpdb,tangp3/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,Quikling/gpdb,adam8157/gpdb,rvs/gpdb,zaksoup/gpdb,kaknikhil/gpdb,chrishajas/gpdb,kaknikhil/gpdb,lintzc/gpdb,atris/gpdb,rvs/gpdb,Chibin/gpdb,adam8157/gpdb,Chibin/gpdb,xinzweb/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,50wu/gpdb,lpetrov-pivotal/gpdb,rubikloud/gpdb,rvs/gpdb,xuegang/gpdb,kaknikhil/gpdb,50wu/gpdb,rubikloud/gpdb,lintzc/gpdb,foyzur/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,tangp3/gpdb,atris/gpdb,greenplum-db/gpdb,edespino/gpdb,ahachete/gpdb,tangp3/gpdb,cjcjameson/gpdb,lintzc/gpdb,rvs/gpdb,Chibin/gpdb,chrishajas/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,ahachete/gpdb,Chibin/gpdb,cjcjameson/gpdb,50wu/gpdb