Added stuck variable for better 'if' statement readability

Author: vovayatsyuk

lib/web/mage/sticky.js

@@ -53,10 +53,8 @@ define([
 
                 offset = Math.max(0, Math.min(offset, this.maxOffset));
 
-                if (offset &&
-                    this.options.offsetTop &&
-                    !this.element.hasClass(this.options.stickyClass)) {
-
+                var stuck = this.element.hasClass(this.options.stickyClass);
+                if (offset && this.options.offsetTop && !stuck) {
                     var offsetTop = 0;
                     if (typeof this.options.offsetTop === 'function') {
                         offsetTop = this.options.offsetTop();