Fix type error

Author: ppelisset

src/Ioctl.php

@@ -22,7 +22,7 @@ public static function attr(mixed $attribute, mixed $defaultValue): mixed
         return self::has($attribute) ? $attribute : $defaultValue;
     }
 
-    public static function ioctl(int $fd, int $request, mixed ...$values): Ioctl
+    public static function ioctl(int $fd, int $request, mixed ...$values): mixed
     {
         return IoctlFunctions::ioctl($fd, $request, ...$values);
     }

src/IoctlFunctions.php

@@ -6,7 +6,7 @@
 
 final class IoctlFunctions
 {
-    private static FFI $ffi;
+    private static ?FFI $ffi = null;
 
     public static function ioctl(int $fd, int $request, mixed ...$values)
     {