bugfix - fixed issue that pertained to ft_selectdata to perform poorly with variable trial length raw data, bug 2584

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9550 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
automatically synchronized identical files to revision 9550

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9551 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0