Clan tag is case-sensitive in 1.8.5 and case-insensitive in 1.99

clan.c

extern t_clan *clanlist_find_clan_by_clantag(int clantag)
{
    t_elem *curr;
    t_clan *clan;

    if (clantag == 0)
	return NULL;
    if (clanlist_head)
    {
	LIST_TRAVERSE(clanlist_head, curr)
	{
	    if (!(clan = elem_get_data(curr)))
	    {
		eventlog(eventlog_level_error, __FUNCTION__, "found NULL entry in list");
		continue;
	    }
	    if (clan->created && (clan->clantag == clantag))
		return clan;
	}

    }

    return NULL;
}

clan.cpp

extern t_clan *clanlist_find_clan_by_clantag(t_clantag clantag)
{
    t_elem *curr;
    t_clan *clan;
    char * needle;

    if (clantag == 0)
	return NULL;

    needle = xstrdup(clantag_to_str(clantag));
    if (clanlist_head)
    {
	LIST_TRAVERSE(clanlist_head, curr)
	{
	    if (!(clan = (t_clan*)elem_get_data(curr)))
	    {
		eventlog(eventlog_level_error, __FUNCTION__, "found NULL entry in list");
		continue;
	    }
	    if (clan->created && !strcasecmp(needle, clantag_to_str(clan->tag))) {
		xfree(needle);
		return clan;
	    }
	}

    }

    xfree(needle);
    return NULL;
}