bug #19272 [Security] fixed DebugAccessDecisionManager::setVoters() (…

…HeahDude)

This PR was merged into the 3.1 branch.

Discussion
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[Security] fixed DebugAccessDecisionManager::setVoters()

| Q             | A
| ------------- | ---
| Branch?       | 3.1
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | schmittjoh/JMSSecurityExtraBundle#207
| License       | MIT
| Doc PR        | ~

Commits
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c1a2a0a [Security] fixed DebugAccessDecisionManager::setVoters()

src/Symfony/Component/Security/Core/Authorization/DebugAccessDecisionManager.php

@@ -62,7 +62,7 @@ public function decide(TokenInterface $token, array $attributes, $object = null)
      */
     public function setVoters(array $voters)
     {
-        if (!$this->manager instanceof AccessDecisionManager) {
+        if (!method_exists($this->manager, 'setVoters')) {
             return;
         }