Fix settings value for password requirements

public/main/inc/lib/api.lib.php

@@ -2231,7 +2231,7 @@ function api_generate_password(int $length = 8, $useRequirements = true): string
     $factory = new RandomLib\Factory();
     $generator = $factory->getGenerator(new SecurityLib\Strength(SecurityLib\Strength::MEDIUM));
 
-    if (is_array($passwordRequirements)) {
+    if (!empty($passwordRequirements)) {
         $length = $passwordRequirements['min']['length'];
         $minNumbers = $passwordRequirements['min']['numeric'];
         $minLowerCase = $passwordRequirements['min']['lowercase'];

public/main/inc/lib/security.lib.php

@@ -548,7 +548,7 @@ class Security
         ];
 
         $passwordRequirements = api_get_setting('security.password_requirements', true);
-        if (is_array($passwordRequirements)) {
+        if (!empty($passwordRequirements)) {
             $requirements = $passwordRequirements;
         }