Correctly get final token

bin/dig/dig.c

@@ -1824,7 +1824,7 @@ plus_option(char *option, bool is_batchfile, bool *need_clone,
 							     "specified");
 							goto exit_or_usage;
 						}
-						extra = strtok_r(NULL, "\0",
+						extra = strtok_r(NULL, "",
 								 &last);
 						save_opt(lookup, code, extra);
 						if (extra != NULL) {
@@ -2820,8 +2820,8 @@ dash_option(char *option, char *next, dig_lookup_t **lookup,
 								    * secret */
 			usage();
 		}
-		if ((ptr3 = strtok_r(NULL, ":", &last)) != NULL) { /* secret or
-								    * NULL */
+		if ((ptr3 = strtok_r(NULL, "", &last)) != NULL) { /* secret or
+								   * NULL */
 			parse_hmac(ptr);
 			ptr = ptr2;
 			ptr2 = ptr3;