docs: mention "-k" for both forms of "git mv"

diff --git a/upload-pack.c b/upload-pack.c
index a9a6c0cb24ba1d91212650a33d9249a5202454aa..03adf28550a30ecd441b9586fc9dfa638c939ce3 100644 (file)
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -533,6 +533,8 @@ static void check_non_tip(void)
        namebuf[41] = '\n';
        for (i = get_max_object_index(); 0 < i; ) {
                o = get_indexed_object(--i);
+               if (!o)
+                       continue;
                if (!(o->flags & OUR_REF))
                        continue;
                memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40);