[OutputEscaper] switched to casting object as string rather than call…

… magic method directly

src/Symfony/Components/OutputEscaper/ObjectDecorator.php

@@ -92,6 +92,6 @@ public function getRaw($key)
      */
     public function __toString()
     {
-        return $this->escape($this->escaper, $this->value->__toString());
+        return $this->escape($this->escaper, (string) $this->value);
     }
 }