replaced strncpy/strncmp by memcpy/memcmp

ChangeLog

src/cdf_int.c

src/dmemory.c

src/griblib.c

src/institution.c

src/make_fint.c

src/model.c

src/stream.c

src/stream_cdf.c

src/stream_grb.c

src/stream_ieg.c

src/table.c

src/vlist_att.c