cat-file: read batch stream with strbuf_getline()

It is possible to prepare a text file with a DOS editor and feed it
as a batch command stream to the command.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/cat-file.c

@@ -401,7 +401,7 @@ static int batch_objects(struct batch_options *opt)
 	save_warning = warn_on_object_refname_ambiguity;
 	warn_on_object_refname_ambiguity = 0;
 
-	while (strbuf_getline_lf(&buf, stdin) != EOF) {
+	while (strbuf_getline(&buf, stdin) != EOF) {
 		if (data.split_on_whitespace) {
 			/*
 			 * Split at first whitespace, tying off the beginning