Fixed bug in PGTYPEStimestamp_sub that used pointers instead of the values to substract.
Fixed bug in PGTYPEStimestamp_sub that used pointers instead of the values to substract.

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