Fix PageGetExactFreeSpace() so that it actually behaves sensibly if pd_lower > pd_upper, rather than merely claiming to.  This would only matter if the page header were corrupt, which shouldn't occur, but ...
Fix PageGetExactFreeSpace() so that it actually behaves sensibly
if pd_lower > pd_upper, rather than merely claiming to.  This would
only matter if the page header were corrupt, which shouldn't occur,
but ...

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