notes: don't access hash of NULL object_id pointer

diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index f650188ef353897898b133047d6f88f71cb17b00..efdc14473be53ff79b13012d650ec5fded052fd9 100644 (file)
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -218,7 +218,7 @@ static void show_datestring(const char *flag, const char *datestr)
        /* date handling requires both flags and revs */
        if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
                return;
-       buffer = xstrfmt("%s%lu", flag, approxidate(datestr));
+       buffer = xstrfmt("%s%"PRItime, flag, approxidate(datestr));
        show(buffer);
        free(buffer);
 }