fixes after testing on visual localizer

Author: Remi-Gau

saveEventsFile.m

@@ -87,9 +87,8 @@
                 duration = logFile(iEvent).duration;
                 trial_type = logFile(iEvent).trial_type;
 
-                if any(isnan([onset trial_type])) || ...
-                        any(isempty([onset trial_type])) || ...
-                        any(strcmp({onset, trial_type}, 'n/a'))
+                if isnan(onset) || ischar(onset) || any(isempty({onset trial_type})) || ...
+                        strcmp(trial_type, 'n/a')
 
                     warning('\nSkipping saving this event.\n onset: %f \n trial_type: %s\n', ...
                         onset, ...