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-rw-r--r--lib/Minz/ExtensionManager.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Minz/ExtensionManager.php b/lib/Minz/ExtensionManager.php
index 9c0eaf001..0e1c72885 100644
--- a/lib/Minz/ExtensionManager.php
+++ b/lib/Minz/ExtensionManager.php
@@ -364,7 +364,7 @@ final class Minz_ExtensionManager {
foreach (self::$hook_list[$hook_name]['list'] as $function) {
$result = call_user_func($function, $arg);
- if (is_null($result)) {
+ if ($result === null) {
break;
}