ensure that the length property is updated when using empty
ensure that the length property is updated when using empty

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)

soapdog/enyo,PKRoma/enyo,mcanthony/enyo,beni55/enyo,kustomzone/enyo,bright-sparks/enyo,wikieswan/enyo,wikieswan/enyo,mcanthony/enyo,zefsolutions/enyo,enyojs/enyo,enyojs/enyo,PKRoma/enyo,zefsolutions/enyo,kustomzone/enyo,beni55/enyo,soapdog/enyo,bright-sparks/enyo