JS: Fix compiler warning as reported in issue18.
JS: Fix compiler warning as reported in issue18.

karimhb/libphonenumber,google/libphonenumber,roes/libphonenumber,google/libphonenumber,gautier-gdx/libphonenumber,javimey/libphonenumber,javimey/libphonenumber,mcanthony/libphonenumber,gautier-gdx/libphonenumber,mistrydarshan99/libphonenumber,Corei13/libphonenumber,mtownsen/libphonenumber,weitzhandler/libphonenumber,javimey/libphonenumber,Corei13/libphonenumber,ceosilvajr/libphonenumber,alecx/libphonenumber,karimhb/libphonenumber,roes/libphonenumber,mtownsen/libphonenumber,mihaelacr-google/libphonenumber,alucic/libphonenumber,lcorbasson/libphonenumber,JasOXIII/libphonenumber,mujiansu/libphonenumber,Corei13/libphonenumber,mihaelacr-google/libphonenumber,google/libphonenumber,alecx/libphonenumber,mihaelacr-google/libphonenumber,ceosilvajr/libphonenumber,johnnyshields/libphonenumber,JasOXIII/libphonenumber,mlevytskiy/libphonenumber,pchero/libphonenumber,javimey/libphonenumber,shelsonjava/libphonenumber,digideskio/libphonenumber,waveremit/libphonenumber,joharmandav/libphonenumber,pchero/libphonenumber,waveremit/libphonenumber,Corei13/libphonenumber,digideskio/libphonenumber,ceosilvajr/libphonenumber,joharmandav/libphonenumber,dpocock/libphonenumber,ceosilvajr/libphonenumber,joharmandav/libphonenumber,johnnyshields/libphonenumber,fishman1986/libphonenumber,lcorbasson/libphonenumber,hejunbinlan/libphonenumber,roes/libphonenumber,keghani/libphonenumber,digideskio/libphonenumber,mistrydarshan99/libphonenumber,weitzhandler/libphonenumber,digideskio/libphonenumber,mistrydarshan99/libphonenumber,alucic/libphonenumber,mistrydarshan99/libphonenumber,mujiansu/libphonenumber,hejunbinlan/libphonenumber,stevenliuit/libphonenumber,mujiansu/libphonenumber,pplatek/libphonenumber,weitzhandler/libphonenumber,fishman1986/libphonenumber,shelsonjava/libphonenumber,stevenliuit/libphonenumber,pplatek/libphonenumber,pplatek/libphonenumber,pchero/libphonenumber,gautier-gdx/libphonenumber,alucic/libphonenumber,mihaelacr-google/libphonenumber,fishman1986/libphonenumber,weitzhandler/libphonenumber,Corei13/libphonenumber,digideskio/libphonenumber,hejunbinlan/libphonenumber,pchero/libphonenumber,keghani/libphonenumber,stevenliuit/libphonenumber,ceosilvajr/libphonenumber,tg123/libphonenumber,pplatek/libphonenumber,mlevytskiy/libphonenumber,mcanthony/libphonenumber,lcorbasson/libphonenumber,hejunbinlan/libphonenumber,mtownsen/libphonenumber,mlevytskiy/libphonenumber,mcanthony/libphonenumber,seegno-forks/libphonenumber,mujiansu/libphonenumber,dpocock/libphonenumber,keghani/libphonenumber,lcorbasson/libphonenumber,dpocock/libphonenumber,joharmandav/libphonenumber,mistrydarshan99/libphonenumber,google/libphonenumber,javimey/libphonenumber,gautier-gdx/libphonenumber,johnnyshields/libphonenumber,karimhb/libphonenumber,dpocock/libphonenumber,karimhb/libphonenumber,google/libphonenumber,fishman1986/libphonenumber,alucic/libphonenumber,JasOXIII/libphonenumber,karimhb/libphonenumber,joharmandav/libphonenumber,shelsonjava/libphonenumber,seegno-forks/libphonenumber,mcanthony/libphonenumber,shelsonjava/libphonenumber,google/libphonenumber,waveremit/libphonenumber,JasOXIII/libphonenumber,johnnyshields/libphonenumber,mujiansu/libphonenumber,alecx/libphonenumber,mihaelacr-google/libphonenumber,pchero/libphonenumber,gautier-gdx/libphonenumber,tg123/libphonenumber,keghani/libphonenumber,mtownsen/libphonenumber,mtownsen/libphonenumber,mlevytskiy/libphonenumber,lcorbasson/libphonenumber,stevenliuit/libphonenumber,seegno-forks/libphonenumber,JasOXIII/libphonenumber,tg123/libphonenumber,stevenliuit/libphonenumber,mlevytskiy/libphonenumber,keghani/libphonenumber,dpocock/libphonenumber,mcanthony/libphonenumber,alecx/libphonenumber,waveremit/libphonenumber,johnnyshields/libphonenumber,hejunbinlan/libphonenumber,alecx/libphonenumber,weitzhandler/libphonenumber,tg123/libphonenumber,tg123/libphonenumber,shelsonjava/libphonenumber,roes/libphonenumber,roes/libphonenumber,fishman1986/libphonenumber,pplatek/libphonenumber,alucic/libphonenumber,waveremit/libphonenumber,seegno-forks/libphonenumber