fixed linux bug which caused ferret to crash when running the gui if there wasnt a .ferret_dods_data file
fixed linux bug which caused ferret to crash when running the gui if there wasnt a .ferret_dods_data file


git-svn-id: 0ef30dc7da0b07cedfa074587325a6c153c0ae55@7166 fdbf22ae-c210-0410-be80-ca943da6b8f8

NOAA-PMEL/PyFerret,NOAA-PMEL/PyFerret,NOAA-PMEL/Ferret,NOAA-PMEL/PyFerret,NOAA-PMEL/PyFerret,NOAA-PMEL/Ferret,NOAA-PMEL/PyFerret,NOAA-PMEL/Ferret,NOAA-PMEL/Ferret,NOAA-PMEL/Ferret