Add a check for HAVE_DECL_ISINF and HAVE_DECL_ISNAN in support of https://github.com/Unidata/netcdf-c/issues/2132
Add a check for HAVE_DECL_ISINF and HAVE_DECL_ISNAN in support of https://github.com/Unidata/netcdf-c/issues/2132

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