fix compiler warning for undefined var
fix compiler warning for undefined var

Signed-off-by: Larry Hamel <c5a53acaa5da6b424e2bd28a0587d04439c72a22@pivotal.io>

xinzweb/gpdb,Quikling/gpdb,ashwinstar/gpdb,xinzweb/gpdb,adam8157/gpdb,kaknikhil/gpdb,adam8157/gpdb,adam8157/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,edespino/gpdb,cjcjameson/gpdb,rvs/gpdb,jmcatamney/gpdb,adam8157/gpdb,Quikling/gpdb,edespino/gpdb,lisakowen/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,lisakowen/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,edespino/gpdb,ashwinstar/gpdb,Quikling/gpdb,50wu/gpdb,Quikling/gpdb,kaknikhil/gpdb,lisakowen/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,50wu/gpdb,edespino/gpdb,xinzweb/gpdb,Chibin/gpdb,adam8157/gpdb,janebeckman/gpdb,rvs/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,rvs/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,janebeckman/gpdb,greenplum-db/gpdb,50wu/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,edespino/gpdb,Chibin/gpdb,edespino/gpdb,janebeckman/gpdb,kaknikhil/gpdb,adam8157/gpdb,Chibin/gpdb,Chibin/gpdb,Quikling/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,Chibin/gpdb,50wu/gpdb,yuanzhao/gpdb,50wu/gpdb,yuanzhao/gpdb,adam8157/gpdb,Quikling/gpdb,Quikling/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,lisakowen/gpdb,janebeckman/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,edespino/gpdb,lisakowen/gpdb,kaknikhil/gpdb,janebeckman/gpdb,janebeckman/gpdb,Quikling/gpdb,Quikling/gpdb,rvs/gpdb,kaknikhil/gpdb,Quikling/gpdb,xinzweb/gpdb,xinzweb/gpdb,rvs/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,Chibin/gpdb,cjcjameson/gpdb,xinzweb/gpdb,jmcatamney/gpdb,50wu/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,edespino/gpdb,Chibin/gpdb,Chibin/gpdb,50wu/gpdb,janebeckman/gpdb,xinzweb/gpdb,rvs/gpdb,rvs/gpdb,cjcjameson/gpdb,50wu/gpdb,ashwinstar/gpdb,rvs/gpdb,xinzweb/gpdb,janebeckman/gpdb,greenplum-db/gpdb,adam8157/gpdb,edespino/gpdb,greenplum-db/gpdb,lisakowen/gpdb,ashwinstar/gpdb,lisakowen/gpdb,kaknikhil/gpdb,rvs/gpdb,janebeckman/gpdb,janebeckman/gpdb,kaknikhil/gpdb,lisakowen/gpdb,edespino/gpdb,Chibin/gpdb,Chibin/gpdb,jmcatamney/gpdb,rvs/gpdb