enhancement - compute timelock.var also if some elements of dof>1, see http://bugzilla.fcdonders.nl/show_bug.cgi?id=2061 (thanks to Joscha)

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@7682 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
Merge branch 'master' of github.com:fieldtrip/fieldtrip