Code review comment for lp:~percona-toolkit-dev/percona-toolkit/pt-duplicate-key-checker-skips-report-when-verbose-on-1402730

Reported intermitent issue as a separate bug.
https://bugs.launchpad.net/percona-toolkit/+bug/1436399

Let's narrow this fix to the original --verbose issue and that the tool issue a warning that FULLTEXT indexes are not computed in the reported total size of duplicates.