bug #9917 [HttpFoundation] fixed PHP warnings (fabpot)

This PR was merged into the 2.5-dev branch.

Discussion
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[HttpFoundation] fixed PHP warnings

Commits
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cf71e22 [HttpFoundation] fixed PHP warnings

src/Symfony/Component/HttpFoundation/JsonResponse.php

@@ -91,7 +91,7 @@ public function setCallback($callback = null)
     public function setData($data = array())
     {
         // Encode <, >, ', &, and " for RFC4627-compliant JSON, which may also be embedded into HTML.
-        $this->data = json_encode($data, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT);
+        $this->data = @json_encode($data, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT);
 
         if (JSON_ERROR_NONE !== json_last_error()) {
             throw new \InvalidArgumentException($this->transformJsonError());