UTF8 support only for string type columns

Author: contactashish13

classes/Visualizer/Source.php

@@ -221,7 +221,7 @@ protected function _normalizeData( $data ) {
 						);
 					}
 					break;
-				default:
+				case 'string':
 					$data[ $i ] = utf8_encode( $data[ $i ] );
 					break;
 			}