bugfix - one more occurence of xml.epoch needed to be changed into xml.epochs. This addresses a (apparently) long-standing issue with test script test_bug1407.m


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9546 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0