Fix mistakes

Author: tvdijen

src/Auth/Source/Ldap.php

@@ -129,7 +129,7 @@ protected function loginSasl(string $username, #[\SensitiveParameter]string $pas
         }
 
         /* Verify the credentials */
-        if (empty($sasl_args)) {
+        if (!is_null($sasl_args)) {
             Assert::isArray($sasl_args);
 
             $this->connector->saslBind(

src/Auth/Source/LdapMulti.php

@@ -117,7 +117,7 @@ protected function loginSasl(
         string $username,
         #[\SensitiveParameter]string $password,
         string $organization,
-        ?array $sasl_args,
+        ?array $sasl_args = [],
     ): array {
         if ($this->includeOrgInUsername) {
             $username = $username . '@' . $organization;