Fix crash when non-supported chars are used as table column names

Author: EnricSala

influxdb-client/SeriesResult.m

@@ -52,7 +52,8 @@
 
  % Convert to a table
  function result = table(obj)
- result = table(obj.Values{:}, 'VariableNames', obj.Fields);
+ names = genvarname(obj.Fields);
+ result = table(obj.Values{:}, 'VariableNames', names);
  end
 
  % Convert to a timetable, with an optional timezone
@@ -64,7 +65,8 @@
  else
  time = obj.time();
  end
- result = timetable(time, obj.Values{:}, 'VariableNames', obj.Fields);
+ names = genvarname(obj.Fields);
+ result = timetable(time, obj.Values{:}, 'VariableNames', names);
  end
  end