initialize settings to any empty object if it's null

Author: contactashish13

js/render.js

@@ -13,6 +13,9 @@
 		series = chart.series;
 		data = chart.data;
 		settings = chart.settings;
+        if(settings == null){
+            settings = {};
+        }
 
 		container = document.getElementById(id);
         if (container == null) {