refactor: fix isset.property errors (#9522)

Author: paulbalandan

system/Autoloader/Autoloader.php

@@ -123,7 +123,7 @@ public function initialize(Autoload $config, Modules $modules)
             $this->files = $config->files;
         }
 
-        if (isset($config->helpers)) {
+        if ($config->helpers !== []) {
             $this->helpers = [...$this->helpers, ...$config->helpers];
         }
 

system/Email/Email.php

@@ -393,7 +393,7 @@ class Email
     /**
      * mbstring.func_overload flag
      *
-     * @var bool
+     * @var bool|null
      */
     protected static $func_overload;
 
@@ -403,8 +403,9 @@ class Email
     public function __construct($config = null)
     {
         $this->initialize($config);
+
         if (! isset(static::$func_overload)) {
-            static::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
+            static::$func_overload = extension_loaded('mbstring') && ini_get('mbstring.func_overload');
         }
     }
 

utils/phpstan-baseline/isset.property.neon

@@ -1,4 +1,4 @@
-# total 3575 errors
+# total 3573 errors
 includes:
     - argument.type.neon
     - assign.propertyType.neon
@@ -11,7 +11,6 @@ includes:
     - deadCode.unreachable.neon
     - empty.notAllowed.neon
     - generator.valueType.neon
-    - isset.property.neon
     - method.alreadyNarrowedType.neon
     - method.childParameterType.neon
     - method.childReturnType.neon