transport-helper: read helper response with strbuf_getline()

Our implementation of helpers never use CRLF line endings, and they
do not depend on the ability to place a CR as payload at the end of
the line, so this is essentially a no-op for in-tree users.  However,
this allows third-party implementation of helpers to give us their
line with CRLF line ending (they cannot expect us to feed CRLF to
them, though).

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

transport-helper.c

@@ -54,7 +54,7 @@ static int recvline_fh(FILE *helper, struct strbuf *buffer, const char *name)
 	strbuf_reset(buffer);
 	if (debug)
 		fprintf(stderr, "Debug: Remote helper: Waiting...\n");
-	if (strbuf_getline_lf(buffer, helper) == EOF) {
+	if (strbuf_getline(buffer, helper) == EOF) {
 		if (debug)
 			fprintf(stderr, "Debug: Remote helper quit.\n");
 		return 1;