refs #6185 Fixed mismatched free (should have been delete).
refs #6185 Fixed mismatched free (should have been delete).

guiquanz/Percona-TokuBackup,Jun-Yuan/Percona-TokuBackup,percona/Percona-TokuBackup,Jun-Yuan/Percona-TokuBackup,Jun-Yuan/Percona-TokuBackup,kbauskar/Percona-TokuBackup,guiquanz/Percona-TokuBackup,tplavcic/Percona-TokuBackup,dbpercona/Percona-TokuBackup,percona/Percona-TokuBackup,guiquanz/Percona-TokuBackup,dbpercona/Percona-TokuBackup,dbpercona/Percona-TokuBackup,percona/Percona-TokuBackup,percona/Percona-TokuBackup,Jun-Yuan/Percona-TokuBackup,tplavcic/Percona-TokuBackup,kbauskar/Percona-TokuBackup,guiquanz/Percona-TokuBackup,tplavcic/Percona-TokuBackup,dbpercona/Percona-TokuBackup,tplavcic/Percona-TokuBackup,kbauskar/Percona-TokuBackup,kbauskar/Percona-TokuBackup