small bug fix again
small bug fix again

cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,undefx/delphi-epidata,undefx/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata