workaround - removed check for .coordsys field, which is now added by mne2grad and ctf2grad to neuromag and ctf datasets


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8345 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0