unset only if settings exist

https://secure.helpscout.net/conversation/976342855/204089/

Author: contactashish13

classes/Visualizer/Module/Admin.php

@@ -782,7 +782,10 @@ public function renderLibraryPage() {
 				$settings = apply_filters( $atts['settings'], $settings, $chart->ID, $type );
 			}
 
-			unset( $settings['height'], $settings['width'], $settings['chartArea'] );
+			if ( $settings ) {
+				unset( $settings['height'], $settings['width'], $settings['chartArea'] );
+			}
+
 			$series = apply_filters( Visualizer_Plugin::FILTER_GET_CHART_SERIES, get_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, true ), $chart->ID, $type );
 			$data   = apply_filters( Visualizer_Plugin::FILTER_GET_CHART_DATA, unserialize( html_entity_decode( $chart->post_content ) ), $chart->ID, $type );