Fix bug in cube picksplit algorithm.
Fix bug in cube picksplit algorithm.

Alexander Korotkov

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