[VarDumper] Move locale sniffing to dump() time

Author: nicolas-grekas

src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php

@@ -39,8 +39,8 @@ abstract class AbstractDumper implements DataDumperInterface, DumperInterface
     public function __construct($output = null, $charset = null)
     {
         $this->setCharset($charset ?: ini_get('php.output_encoding') ?: ini_get('default_charset') ?: 'UTF-8');
-        $this->decimalPoint = (string) 0.5;
-        $this->decimalPoint = $this->decimalPoint[1];
+        $this->decimalPoint = localeconv();
+        $this->decimalPoint = $this->decimalPoint['decimal_point'];
         $this->setOutput($output ?: static::$defaultOutput);
         if (!$output && is_string(static::$defaultOutput)) {
             static::$defaultOutput = $this->outputStream;
@@ -134,6 +134,9 @@ public function setIndentPad($pad)
      */
     public function dump(Data $data, $output = null)
     {
+        $this->decimalPoint = localeconv();
+        $this->decimalPoint = $this->decimalPoint['decimal_point'];
+
         $exception = null;
         if ($output) {
             $prevOutput = $this->setOutput($output);