fixing this

Author: Orion Free

lib/sticky.js

@@ -180,8 +180,8 @@ var Sticky = (function(_React$Component) {
           this.scrollSubscription = this.props.extObserver.subscribe(function(
             event
           ) {
-            if (this.props.match !== '') {
-              if (event.type === this.props.match) {
+            if (_this.props.match !== '') {
+              if (event.type === _this.props.match) {
                 _this.recomputeState()
               }
             } else {