* nis/nis_call.c (nis_server_cache_search): Save errno around stat

	call.
	(__nisfind_server): Similar for open readColdStartFile call.
	Patch partially by Jim Meyering.
	* nss/nss_files/files-XXX.c (_nss_files_getXXent_r): Save errno
	around internal_setent call.