BUG/MINOR: stats: Add a break after filling ST_F_MODE field for servers

The previous patch was pushed too quickly (399bf72f6 "BUG/MINOR: stats:
Remove a break preventing ST_F_QCUR to be set for servers"). It was not an
extra break but a misplaced break statement. Thus, now a break statement
must be added after filling the ST_F_MODE field in stats_fill_sv_stats().

No backport needed except if the above commit is backported.
1 file changed