* io/ftw.c (open_dir_stream): Return right away if REALLOC fails.

* io/ftw.c (open_dir_stream): Return right away if REALLOC fails.

	[Coverity CID 229, 230]

	* argp/argp-help.c (hol_entry_help): Handle STATE==NULL in ARG and
	DGETTEXT calls.
	(hol_help): Likewise.  [Coverity CID 226, 227]

	* string/argz-replace.c (__argz_replace): Unconditionally call
	free on SRC.  [Coverity CID 225]

	* nis/nis_creategroup.c (nis_creategroup): No need to duplicate
	the return value of __nis_default_owner and __nis_default_group,
	it has been especially allocated.  [Coverity CID 224]