just error checkiing

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1951 c368ceb8-fd28-0410-a457-e46ee1d7cd4a
add error check for ECHAR

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1952 c368ceb8-fd28-0410-a457-e46ee1d7cd4a
test bigrecords.f only when large_file_test is enabled

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1953 c368ceb8-fd28-0410-a457-e46ee1d7cd4a
silence compile warnings

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1954 c368ceb8-fd28-0410-a457-e46ee1d7cd4a