fix build error

frappe/public/js/frappe/views/gantt.js

@@ -167,8 +167,7 @@ var Gantt = Class.extend({
 	},
 	set_scroll_position: function() {
 		document.querySelector(this.opts.parent_selector).parentElement.scrollLeft =
-				this.get_min_date().diff(this.start, 'hours')
-				/ this.opts.step * this.opts.column_width;
+				this.get_min_date().diff(this.start, 'hours') / this.opts.step * this.opts.column_width;
 	},
 	get_min_date: function() {
 		return this.tasks.reduce(function(acc, curr) {