Fix bug in mic2ascii(). It does not handle correctly if none ASCII chars are in the input.
Fix bug in mic2ascii(). It does not handle correctly if none ASCII
chars are in the input.

tangp3/gpdb,janebeckman/gpdb,yuanzhao/gpdb,royc1/gpdb,ashwinstar/gpdb,randomtask1155/gpdb,xuegang/gpdb,rubikloud/gpdb,kmjungersen/PostgresXL,janebeckman/gpdb,lisakowen/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,lintzc/gpdb,tangp3/gpdb,ovr/postgres-xl,randomtask1155/gpdb,ahachete/gpdb,ovr/postgres-xl,Chibin/gpdb,adam8157/gpdb,edespino/gpdb,ovr/postgres-xl,ahachete/gpdb,xuegang/gpdb,CraigHarris/gpdb,arcivanov/postgres-xl,royc1/gpdb,arcivanov/postgres-xl,50wu/gpdb,zaksoup/gpdb,ahachete/gpdb,lpetrov-pivotal/gpdb,tangp3/gpdb,xuegang/gpdb,cjcjameson/gpdb,lintzc/gpdb,adam8157/gpdb,yazun/postgres-xl,Quikling/gpdb,lisakowen/gpdb,oberstet/postgres-xl,tpostgres-projects/tPostgres,lisakowen/gpdb,lpetrov-pivotal/gpdb,foyzur/gpdb,tangp3/gpdb,pavanvd/postgres-xl,lintzc/gpdb,Postgres-XL/Postgres-XL,zaksoup/gpdb,50wu/gpdb,ahachete/gpdb,snaga/postgres-xl,randomtask1155/gpdb,chrishajas/gpdb,0x0FFF/gpdb,chrishajas/gpdb,xinzweb/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,lintzc/gpdb,rvs/gpdb,edespino/gpdb,tangp3/gpdb,janebeckman/gpdb,lisakowen/gpdb,zaksoup/gpdb,pavanvd/postgres-xl,snaga/postgres-xl,arcivanov/postgres-xl,royc1/gpdb,chrishajas/gpdb,royc1/gpdb,kmjungersen/PostgresXL,zeroae/postgres-xl,CraigHarris/gpdb,50wu/gpdb,50wu/gpdb,chrishajas/gpdb,tangp3/gpdb,cjcjameson/gpdb,yazun/postgres-xl,postmind-net/postgres-xl,jmcatamney/gpdb,50wu/gpdb,ovr/postgres-xl,0x0FFF/gpdb,rubikloud/gpdb,janebeckman/gpdb,Chibin/gpdb,xuegang/gpdb,xinzweb/gpdb,oberstet/postgres-xl,Quikling/gpdb,zeroae/postgres-xl,atris/gpdb,jmcatamney/gpdb,50wu/gpdb,adam8157/gpdb,0x0FFF/gpdb,Chibin/gpdb,Quikling/gpdb,lintzc/gpdb,xinzweb/gpdb,royc1/gpdb,50wu/gpdb,0x0FFF/gpdb,Postgres-XL/Postgres-XL,CraigHarris/gpdb,rubikloud/gpdb,randomtask1155/gpdb,yuanzhao/gpdb,foyzur/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,janebeckman/gpdb,rubikloud/gpdb,kmjungersen/PostgresXL,adam8157/gpdb,0x0FFF/gpdb,lintzc/gpdb,cjcjameson/gpdb,postmind-net/postgres-xl,ahachete/gpdb,royc1/gpdb,xuegang/gpdb,oberstet/postgres-xl,tpostgres-projects/tPostgres,foyzur/gpdb,royc1/gpdb,edespino/gpdb,janebeckman/gpdb,xuegang/gpdb,50wu/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,yazun/postgres-xl,lpetrov-pivotal/gpdb,janebeckman/gpdb,jmcatamney/gpdb,xinzweb/gpdb,adam8157/gpdb,rubikloud/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,CraigHarris/gpdb,foyzur/gpdb,pavanvd/postgres-xl,atris/gpdb,greenplum-db/gpdb,lintzc/gpdb,postmind-net/postgres-xl,kaknikhil/gpdb,edespino/gpdb,pavanvd/postgres-xl,postmind-net/postgres-xl,randomtask1155/gpdb,adam8157/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,edespino/gpdb,adam8157/gpdb,techdragon/Postgres-XL,atris/gpdb,snaga/postgres-xl,zaksoup/gpdb,rvs/gpdb,CraigHarris/gpdb,ashwinstar/gpdb,Quikling/gpdb,edespino/gpdb,yuanzhao/gpdb,0x0FFF/gpdb,foyzur/gpdb,rubikloud/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,chrishajas/gpdb,rvs/gpdb,xinzweb/gpdb,lisakowen/gpdb,randomtask1155/gpdb,chrishajas/gpdb,rubikloud/gpdb,Quikling/gpdb,atris/gpdb,yazun/postgres-xl,xinzweb/gpdb,ashwinstar/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,Postgres-XL/Postgres-XL,postmind-net/postgres-xl,rvs/gpdb,snaga/postgres-xl,arcivanov/postgres-xl,jmcatamney/gpdb,cjcjameson/gpdb,Quikling/gpdb,ahachete/gpdb,0x0FFF/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,jmcatamney/gpdb,yuanzhao/gpdb,janebeckman/gpdb,Quikling/gpdb,yuanzhao/gpdb,kmjungersen/PostgresXL,foyzur/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,techdragon/Postgres-XL,yuanzhao/gpdb,ahachete/gpdb,rvs/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,Quikling/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,tangp3/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,lisakowen/gpdb,lisakowen/gpdb,foyzur/gpdb,royc1/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,oberstet/postgres-xl,rvs/gpdb,rvs/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,lpetrov-pivotal/gpdb,zaksoup/gpdb,lpetrov-pivotal/gpdb,pavanvd/postgres-xl,rvs/gpdb,edespino/gpdb,techdragon/Postgres-XL,greenplum-db/gpdb,rvs/gpdb,janebeckman/gpdb,kaknikhil/gpdb,techdragon/Postgres-XL,lintzc/gpdb,lintzc/gpdb,ahachete/gpdb,randomtask1155/gpdb,xuegang/gpdb,atris/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,zeroae/postgres-xl,Quikling/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,kaknikhil/gpdb,tpostgres-projects/tPostgres,adam8157/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,ovr/postgres-xl,janebeckman/gpdb,atris/gpdb,edespino/gpdb,foyzur/gpdb,Chibin/gpdb,zaksoup/gpdb,Chibin/gpdb,snaga/postgres-xl,kmjungersen/PostgresXL,Chibin/gpdb,rvs/gpdb,zeroae/postgres-xl,lisakowen/gpdb,Chibin/gpdb,tpostgres-projects/tPostgres,atris/gpdb,Quikling/gpdb,zaksoup/gpdb,techdragon/Postgres-XL,ashwinstar/gpdb,xinzweb/gpdb,rubikloud/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,tangp3/gpdb,tpostgres-projects/tPostgres,chrishajas/gpdb,zaksoup/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,yazun/postgres-xl,atris/gpdb,edespino/gpdb,Chibin/gpdb,xuegang/gpdb,lpetrov-pivotal/gpdb,chrishajas/gpdb,edespino/gpdb,arcivanov/postgres-xl,kaknikhil/gpdb,cjcjameson/gpdb,randomtask1155/gpdb,xuegang/gpdb,zeroae/postgres-xl