* nis/nis_defaults.c (searchXYX): New functions. Used by both
searchgroup and searchowner. Significantly simplified.
(__nis_default_owner): Remove duplication. Do not locally copy the
string before duplicating it.
(__nis_default_group): Likewise.
* nis/nis_lookup.c (nis_lookup): After calling nis_free_directory,
we must clear the variable before calling __nisfind_server.
* nis/nis_lookup.c (nis_lookup): Always free memory allocated with
nis_getnames. [Coverity CID 223]
* locale/programs/locfile.c (locfile_read): Use alloca instead of
xmalloc to allocate local repertoire name. [Coverity CID 222]
* iconv/iconv_charmap.c (use_to_charmap): No need to dynamically
allocate memory for the input to add_bytes. [Coverity CID 221]
was allocated here. [Coverity CID 219, 220]