Fix a the failing ClassCreate test case in IE.
Fix a the failing ClassCreate test case in IE.

sdumitriu/prototype,mc0/fusejs,ridixcr/prototype,madrobby/prototype,jgornick/fusejs,ShefronYudy/prototype,baiyanghese/prototype,Gargaj/prototype,ldf7801528/prototype,292388900/prototype,loduis/prototype,sstephenson/prototype,kensnyder/fusejs,sdumitriu/prototype,lamsieuquay/prototype,sstephenson/prototype,fashionsun/prototype,ldf7801528/prototype,Jiasm/prototype,loduis/prototype,fashionsun/prototype,kangax/prototype,fashionsun/prototype,savetheclocktower/prototype,mc0/fusejs,baiyanghese/prototype,GunioRobot/fusejs,ShefronYudy/prototype,savetheclocktower/prototype,sstephenson/prototype,sdumitriu/prototype,lamsieuquay/prototype,Jiasm/prototype,292388900/prototype,ridixcr/prototype,GunioRobot/fusejs,loduis/prototype,erpframework/prototype,kangax/prototype,ldf7801528/prototype,leafo/prototype,292388900/prototype,Jiasm/prototype,Gargaj/prototype,erpframework/prototype,Gargaj/prototype,erpframework/prototype,leafo/prototype,lamsieuquay/prototype,madrobby/prototype,ridixcr/prototype,kensnyder/fusejs,jgornick/fusejs,ShefronYudy/prototype