fix nc_test/tst_addvar.c. This program reads output file tst_pnetcdf.nc generated from tst_pnetcdf.c.
fix nc_test/tst_addvar.c. This program reads output file
tst_pnetcdf.nc generated from tst_pnetcdf.c.

Unidata/netcdf-c,Unidata/netcdf-c,Unidata/netcdf-c,Unidata/netcdf-c