unpack_object_header_buffer(): clear the size field upon error

The callers do not use the returned size when the function says
it did not use any bytes and sets the type to OBJ_BAD, so this
should not matter in practice, but it is a good code hygiene
anyway.

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

diff --git a/sha1_file.c b/sha1_file.c
index 27f3b9b278a97f66f92ca61a2bc39e30f0a70317..833f5b9b5820ce60f9fb99f6c9bcdb313ae8fca9 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1267,7 +1267,8 @@ unsigned long unpack_object_header_buffer(const unsigned char *buf,
        while (c & 0x80) {
                if (len <= used || bitsizeof(long) <= shift) {
                        error("bad object header");
-                       return 0;
+                       size = used = 0;
+                       break;
                }
                c = buf[used++];
                size += (c & 0x7f) << shift;