apply_filters_ref_array does not work sometimes

Author: contactashish13

classes/Visualizer/Module/Frontend.php

@@ -231,8 +231,10 @@ public function renderChart( $atts ) {
 		$id         = $id . '-' . rand();
 		$arguments  = array( '', $id, $settings );
 		apply_filters_ref_array( 'visualizer_pro_inline_css', array( &$arguments ) );
-		$css        = $arguments[0];
-		$settings   = $arguments[2];
+		if ( ! empty( $arguments ) ) {
+			$css        = $arguments[0];
+			$settings   = $arguments[2];
+		}
 
 		// add chart to the array
 		$this->_charts[ $id ] = array(

js/render.js

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