584 	*lang = NUL;  in spell_load_file()
778 		    if (c == NUL)  in suggest_load_files()
852     lp->sl_regions[len] = NUL;  in read_region_section()
932 	    *p = NUL;  in read_prefcond_section()
1024 	int	c = NUL;  in read_sal_section()
1043 	*p++ = NUL;  in read_sal_section()
1056 	    *p++ = NUL;  in read_sal_section()
1070 	*p++ = NUL;  in read_sal_section()
1114 	p[0] = NUL;  in read_sal_section()
1157 	    if (word[i] == NUL)  in read_words_section()
1299     *cp = NUL;  in read_compound()
1308     *ap = NUL;  in read_compound()
1336 	    *ap = NUL;  in read_compound()
1352 		    *cp = NUL;  in read_compound()
1391     *pp = NUL;  in read_compound()
1394 	*crp = NUL;  in read_compound()
1434 	for (p = from, s = to; *p != NUL && *s != NUL; )  in set_sofo()
1441 	if (*p != NUL || *s != NUL)	    // lengths differ  in set_sofo()
1458 	for (p = from, s = to; *p != NUL && *s != NUL; )  in set_sofo()
1471 		*inp++ = NUL;		// NUL at the end  in set_sofo()
1484 	for (i = 0; to[i] != NUL; ++i)  in set_sofo()
1565 	for (p = s; *p != NUL; )  in mb_str2wide()
1567 	res[i] = NUL;  in mb_str2wide()
2068     if (*p != NUL)  in spell_check_msm()
2126 	if (node->wn_byte != NUL)  in spell_print_node()
2144 	if (node->wn_byte == NUL)  in spell_print_node()
2152 	if (node->wn_byte != NUL && node->wn_child != NULL)  in spell_print_node()
2297 	    while (*p != NUL && *p <= ' ')  // skip white space and CR/NL  in spell_read_aff()
2299 	    if (*p == NUL)  in spell_read_aff()
2311 	    if (*p == NUL)  in spell_read_aff()
2313 	    *p++ = NUL;  in spell_read_aff()
2480 		if (compflags != NULL || *skipdigits(items[1]) != NUL)  in spell_read_aff()
2727 			*aff_entry->ae_flags++ = NUL;  in spell_read_aff()
2771 						   aff_entry->ae_chop)] == NUL)  in spell_read_aff()
2788 				    *p = NUL;  in spell_read_aff()
2910 		    for (p = items[1]; *p != NUL; MB_PTR_ADV(p))  in spell_read_aff()
2913 		    for (p = items[2]; *p != NUL; MB_PTR_ADV(p))  in spell_read_aff()
2937 		    for (p = items[1]; *p != NUL; )  in spell_read_aff()
3139 	for (p = entry->ae_flags; *p != NUL; )  in aff_process_flags()
3155 	if (*entry->ae_flags == NUL)  in aff_process_flags()
3198     if (*p != NUL)  in affitem2flag()
3234 	    if (**pp == NUL)  in get_affitem()
3281     for (p = compflags; *p != NUL; )  in process_compflags()
3323     *tp = NUL;  in process_compflags()
3358 	    for (p = afflist; *p != NUL; )  in flag_in_afflist()
3362 								 && *p != NUL)  in flag_in_afflist()
3370 	    for (p = afflist; *p != NUL; )  in flag_in_afflist()
3377 		if (*p != NUL)	// skip over comma  in flag_in_afflist()
3560 	line[l] = NUL;  in spell_read_dic()
3583 	for (p = w; *p != NUL; MB_PTR_ADV(p))  in spell_read_dic()
3589 		*p = NUL;  in spell_read_dic()
3648 	store_afflist[0] = NUL;  in spell_read_dic()
3754     for (p = afflist; *p != NUL; )  in get_pfxlist()
3774     store_afflist[cnt] = NUL;  in get_pfxlist()
3795     for (p = afflist; *p != NUL; )  in get_compflags()
3810     store_afflist[cnt] = NUL;  in get_compflags()
3899 				*newword = NUL;  in store_aff_word()
3928 				*p = NUL;  in store_aff_word()
3991 				for (i = pfxlen; pfxlist[i] != NUL; ++i)  in store_aff_word()
3994 						   use_pfxlist[j] != NUL; ++j)  in store_aff_word()
3997 				    if (use_pfxlist[j] == NUL)  in store_aff_word()
4000 					use_pfxlist[j] = NUL;  in store_aff_word()
4132 	rline[l] = NUL;  in spell_read_wordfile()
4217 	    *p++ = NUL;  in spell_read_wordfile()
4218 	    while (*p != NUL)  in spell_read_wordfile()
4399 	if (!need_affix || (p != NULL && *p != NUL))  in store_word()
4402 	if (p == NULL || *p == NUL)  in store_word()
4411 	    if (!need_affix || (p != NULL && *p != NUL))  in store_word()
4414 	    if (p == NULL || *p == NUL)  in store_word()
4463 		if (np->wn_byte == NUL)  in tree_add_word()
4488 		    || (node->wn_byte == NUL  in tree_add_word()
4503 		|| (word[i] == NUL  in tree_add_word()
4532 	if (word[i] == NUL)  in tree_add_word()
4789 	if (np->wn_byte == NUL)  in node_compress()
4807     node->wn_u1.hashkey[5] = NUL;  in node_compress()
4827 		|| (p1->wn_byte == NUL  in node_equal()
5283 	    if (np->wn_byte != NUL)  in clear_node()
5603 		tword[depth] = NUL;  in sug_filltree()
5694 	if (p->wn_byte == NUL)  in sug_filltable()
5698 	    for (np = p; np != NULL && np->wn_byte == NUL; np = np->wn_sibling)  in sug_filltable()
5715 	    ((char_u *)gap->ga_data)[gap->ga_len++] = NUL;  in sug_filltable()
5724 	    while (p->wn_sibling != NULL && p->wn_sibling->wn_byte == NUL)  in sug_filltable()
6209 	if (*curwin->w_s->b_p_spf == NUL)  in spell_add_word()
6215 	if (*curwin->w_s->b_p_spf == NUL)  in spell_add_word()
6224 	for (spf = curwin->w_s->b_p_spf, i = 1; *spf != NUL; ++i)  in spell_add_word()
6229 	    if (*spf == NUL)  in spell_add_word()
6311 		*p = NUL;  in spell_add_word()
6363     if (*curwin->w_s->b_p_spl != NUL && curwin->w_s->b_langp.ga_len > 0)  in init_spellfile()
6371 	for (lend = curwin->w_s->b_p_spl; *lend != NUL  in init_spellfile()
6382 	while (*rtp != NUL)  in init_spellfile()
6444     while (*pf != NUL)  in set_spell_chartab()
6446 	if (*pl == NUL || *pu == NUL)  in set_spell_chartab()
6491     if (*pl != NUL || *pu != NUL)  in set_spell_chartab()
6526 	if (*p != NUL)  in set_spell_charflags()
6619     if (*map == NUL)  in set_map_str()
6636     for (p = map; *p != NUL; )  in set_map_str()
6661 		b[cl] = NUL;  in set_map_str()
6663 		b[cl + 1 + headcl] = NUL;  in set_map_str()