bug symfony#14422 Update DebugClassLoader.php (userfriendly)

This PR was merged into the 2.7 branch.

Discussion
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Update DebugClassLoader.php

Using name property of ReflectionClass instance in strncmp instead of __toString() return value, the latter seemed to breaking one of hte vendor bundles we use, and it seems fine now with the former.

Commits
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dcc6586 Update DebugClassLoader.php

src/Symfony/Component/Debug/DebugClassLoader.php

@@ -195,7 +195,7 @@ public function loadClass($class)
                 }
                 $parent = $refl->getParentClass();
 
-                if (!$parent || strncmp($ns, $parent, $len)) {
+                if (!$parent || strncmp($ns, $parent->name, $len)) {
                     if ($parent && isset(self::$deprecated[$parent->name]) && strncmp($ns, $parent->name, $len)) {
                         trigger_error(sprintf('The %s class extends %s that is deprecated %s', $name, $parent->name, self::$deprecated[$parent->name]), E_USER_DEPRECATED);
                     }