yui/yui3 — pull request #620 by armetiz (2013-04-16 16:05:47+00:00)
Title: Useless check

this._html5 is already check on this.upgrade() function and false is return is html5 is also false..
Any way, I think this is an useless check. Or maybe do you think it's more optimize to check property instead of a function call..