[PATCH] hidclass.sys: Handle POP and PUSH in device descriptors

[Nikolay Sivov]

> +    if (list_count(&caps_stack))
> +    {
> +        struct caps_stack *entry, *cursor;
> +        ERR("%i unpopped device caps on the stack\n", list_count(&caps_stack));
> +        LIST_FOR_EACH_ENTRY_SAFE(entry, cursor, &caps_stack, struct caps_stack, entry)
> +            list_remove(&entry->entry);
> +    }
> +
If you only want to check if there's any elements left, it's faster to 
do list_empty().