bugfix - don't try to convert magnetometer channel to amplitude/distance, see http://bugzilla.fcdonders.nl/show_bug.cgi?id=2425


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9206 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
automatically synchronized identical files to revision 9206

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9207 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0