Bug: Call to function is_array() with bool (#5098)

Author: sreichel

.phpstan.dist.baseline.neon

@@ -2382,12 +2382,6 @@ parameters:
 			count: 2
 			path: app/code/core/Mage/Log/Model/Resource/Log.php
 
-		-
-			rawMessage: 'Call to function is_null() with bool will always evaluate to false.'
-			identifier: function.impossibleType
-			count: 1
-			path: app/code/core/Mage/Newsletter/Model/Subscriber.php
-
 		-
 			rawMessage: 'Call to function is_null() with Mage_Newsletter_Model_Queue will always evaluate to false.'
 			identifier: function.impossibleType

app/code/core/Mage/Newsletter/Model/Subscriber.php

@@ -469,7 +469,7 @@ public function subscribeCustomer($customer)
 
         $this->save();
         $sendSubscription = $customer->getData('sendSubscription') || $sendInformationEmail;
-        if (is_null($sendSubscription) xor $sendSubscription) {
+        if ($sendSubscription) {
             if ($this->getIsStatusChanged() && $status == self::STATUS_UNSUBSCRIBED) {
                 $this->sendUnsubscriptionEmail();
             } elseif ($this->getIsStatusChanged() && $status == self::STATUS_SUBSCRIBED) {