fix since array_of_CSV::Row #include?(nil) cause err ;because include method call method== and overwrited == method call nil.row excepting #==(arg)  is CSV::Row
fix since array_of_CSV::Row #include?(nil) cause err ;because include method call method== and overwrited == method call nil.row excepting #==(arg)  is CSV::Row

lisosia/gui_viewer,lisosia/gui_viewer,lisosia/gui_viewer,lisosia/gui_viewer,lisosia/gui_viewer,lisosia/gui_viewer