Avoid shell syntax error if list of languages is empty.
Avoid shell syntax error if list of languages is empty.

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