bugfix(2479/2606): ft_timelockstatistics (and presumably ft_freqstatistics) can now properly deal with avgoverchan=yes


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9613 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0