git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/builtin-fmt-merge-msg.c b/builtin-fmt-merge-msg.c
index 8a3c962f8920bb883287053c850adf78312ff19b..ebb3f37cf158dc479f364111893279805fa9a230 100644 (file)
--- a/builtin-fmt-merge-msg.c
+++ b/builtin-fmt-merge-msg.c
@@ -176,7 +176,7 @@ static void shortlog(const char *name, unsigned char *sha1,
        struct commit *commit;
        struct object *branch;
        struct list subjects = { NULL, NULL, 0, 0 };
-       int flags = UNINTERESTING | TREECHANGE | SEEN | SHOWN | ADDED;
+       int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
 
        branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
        if (!branch || branch->type != OBJ_COMMIT)
@@ -187,7 +187,8 @@ static void shortlog(const char *name, unsigned char *sha1,
        add_pending_object(rev, branch, name);
        add_pending_object(rev, &head->object, "^HEAD");
        head->object.flags |= UNINTERESTING;
-       prepare_revision_walk(rev);
+       if (prepare_revision_walk(rev))
+               die("revision walk setup failed");
        while ((commit = get_revision(rev)) != NULL) {
                char *oneline, *bol, *eol;