Fixed conflict between wow.js and jQuery Revolution Slider

When using WOW.js and jQuery Revolution Slider, if the latter has a caption with the data-splitin=words or data-splitin=chars property applied, a javascript error is reported in console as follows:
Uncaught TypeError: undefined is not a function wow.js:185
WOW.WOW.doSync wow.js:185
(anonymous function) wow.js:150
MutationObserver.observe.childList

Fixed by adding "if(element.nodeType !== 1) return;".