[TwigBridge] Symfony 3.1 forward compatibility

Author: xabbuh

src/Symfony/Bridge/Twig/Extension/YamlExtension.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bridge\Twig\Extension;
 
 use Symfony\Component\Yaml\Dumper as YamlDumper;
+use Symfony\Component\Yaml\Yaml;
 
 /**
  * Provides integration of the Yaml component with Twig.
@@ -40,7 +41,7 @@ public function encode($input, $inline = 0, $dumpObjects = false)
         }
 
         if (defined('Symfony\Component\Yaml\Yaml::DUMP_OBJECT')) {
-            $dumpObjects = (int) $dumpObjects;
+            return $dumper->dump($input, $inline, 0, is_bool($dumpObjects) ? Yaml::DUMP_OBJECT : 0);
         }
 
         return $dumper->dump($input, $inline, 0, false, $dumpObjects);