tree-diff: don't access hash of NULL object_id pointer

diff --git a/sha1_name.c b/sha1_name.c
index de8278530aea1e1657671702c5cfaa5ad9c31aff..389276e9d34cb6681cf97ed975ff0b46e249f023 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -660,8 +660,8 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1,
 
        if (reflog_len) {
                int nth, i;
-               unsigned long at_time;
-               unsigned long co_time;
+               timestamp_t at_time;
+               timestamp_t co_time;
                int co_tz, co_cnt;
 
                /* Is it asking for N-th entry, or approxidate? */
@@ -1054,7 +1054,7 @@ struct grab_nth_branch_switch_cbdata {
 };
 
 static int grab_nth_branch_switch(struct object_id *ooid, struct object_id *noid,
-                                 const char *email, unsigned long timestamp, int tz,
+                                 const char *email, timestamp_t timestamp, int tz,
                                  const char *message, void *cb_data)
 {
        struct grab_nth_branch_switch_cbdata *cb = cb_data;