* enyo.dom.getComputedStyle: prevent from causing an exception on Firefox.
* enyo.dom.getComputedStyle: prevent from causing an exception on Firefox.

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