Fix memory leak in gp_read_error_log().
Fix memory leak in gp_read_error_log().

The code incorrectly called free() on last+1 element of the array. The
array returned by cdbdisp_dispatchRMCommand() always has a NULL element as
terminator, and free(NULL) is a no-op, which is why this didn't outright
crash. But clearly the intention here was to free() the array itself,
otherwise it's leaked.

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