add case that does not require type conversion

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1969 c368ceb8-fd28-0410-a457-e46ee1d7cd4a
more space for these strings

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1970 c368ceb8-fd28-0410-a457-e46ee1d7cd4a