[albertlast]

Description

Backport of #9725.

The statistics centre counts the twenty members with the most topics, looks up their names, and places each by rank:

$i = array_search($row_members['id_member'], array_keys($members));
// skip all not top 10
if ($i > 10)
	continue;

Two things go wrong:

• $i > 10 keeps ranks 0 to 10, which is eleven. Every other list on the page has ten.
• A starter with no member to name leaves an empty rank. Topics credited to member 0 (guests) or to a deleted member are counted, but the name lookup finds nobody, so the list comes out one short.

The two can cancel out: on a forum where one of the top eleven is a guest, the list shows ten. So fixing only the > would leave a gap.

It now takes the members that were found, in rank order, and keeps the first ten.

Testing

Checked on a freshly installed release-2.1 forum, on MySQL 8.4 and PostgreSQL 17, with twelve members holding two topics each:

	before	after
no guest topics	11 entries	10 entries
guests ranked first	10 entries (the two faults cancel)	10 entries

Nothing in log_errors.

Issues References (Fixes|Related|Closes)

Related: #9753, #9725

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