xmlGetUTF8Char()'s second argument is both input and output.  Fix uninitialized value, and avoid invoking the function nine separate times in the pg_xmlIsNameChar macro.  Should resolve buildfarm failures. Per report from Ben Leslie.
xmlGetUTF8Char()'s second argument is both input and output.  Fix
uninitialized value, and avoid invoking the function nine separate
times in the pg_xmlIsNameChar macro.  Should resolve buildfarm failures.
Per report from Ben Leslie.

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