bugfix-default for method was not set

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@10602 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0

ft_globalmeanfield.m

@@ -89,7 +89,7 @@
 datain = ft_checkdata(datain, 'datatype', {'timelock'}, 'feedback', 'yes', 'hassampleinfo', 'yes');
 
 % get the options
-method    = ft_getopt(cfg, 'method', 'amplitude');        
+cfg.method    = ft_getopt(cfg, 'method', 'amplitude');        
 
 % ensure that the options are valid
 cfg = ft_checkopt(cfg, 'method', 'char', {'amplitude', 'power'});