Fix build issue with itemEventsHandler.js.
Fix build issue with itemEventsHandler.js.

IveWong/winjs,Guadzilah/winjs,grork/winjs,jmptrader/winjs,IveWong/winjs,edrohler/winjs,ladyinblack/winjs,kevinwsbr/winjs,edrohler/winjs,PaulWells/winjs,ladyinblack/winjs,gautamsi/winjs,gautamsi/winjs,gautamsi/winjs,Guadzilah/winjs,GREYFOXRGR/winjs,CensoredUser/winjs,kevinwsbr/winjs,nobuoka/winjs,rigdern/winjs,Guadzilah/winjs,KevinTCoughlin/winjs,grork/winjs,KevinTCoughlin/winjs,rigdern/winjs,GREYFOXRGR/winjs,CensoredUser/winjs,GREYFOXRGR/winjs,edrohler/winjs,PaulWells/winjs,IveWong/winjs,grork/winjs,rigdern/winjs,ladyinblack/winjs,kevinwsbr/winjs,nobuoka/winjs,jmptrader/winjs,KevinTCoughlin/winjs,nobuoka/winjs,CensoredUser/winjs,PaulWells/winjs,jmptrader/winjs