fix octave warning

Author: Remi-Gau

src/saveEventsFile.m

@@ -215,15 +215,15 @@ function printHeaderExtraColumns(logFile)
 
         logFile(iEvent).(namesExtraColumns{iExtraColumn}) = data;
 
-        if any(isnan(data))
+        if ~ischar(data) && any(isnan(data))
             warning('saveEventsFile:missingData', ...
                 'Missing some %s data for this event.', namesExtraColumns{iExtraColumn});
 
             if cfg.verbose
                 disp(logFile(iEvent));
             end
 
-        elseif all(isnan(data))
+        elseif ~ischar(data) && all(isnan(data))
             warning('Missing %s data for this event.', namesExtraColumns{iExtraColumn});
 
             if cfg.verbose

tests/test_saveEventsFileSave.m

@@ -137,7 +137,7 @@ function test_saveEventsFileSaveMissingInfo()
 end
 
 function test_saveEventsFileSaveArraySize()
-
+    
     %% set up
 
     [cfg, logFile] = setUp();