treewide: replace maybe_tree with accessor methods

diff --git a/builtin/log.c b/builtin/log.c
index 14fdf39165d20602ad8b682b55660ec2466c1d20..f4d30d2f3da84f9f18de4fbf16ada6f96c9cb836 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -188,8 +188,8 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
        if (rev->show_notes)
                init_display_notes(&rev->notes_opt);
 
-       if (rev->diffopt.pickaxe || rev->diffopt.filter ||
-           rev->diffopt.flags.follow_renames)
+       if ((rev->diffopt.pickaxe_opts & DIFF_PICKAXE_KINDS_MASK) ||
+           rev->diffopt.filter || rev->diffopt.flags.follow_renames)
                rev->always_show_header = 0;
 
        if (source)
@@ -1064,8 +1064,8 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
 
        diff_setup_done(&opts);
 
-       diff_tree_oid(&origin->tree->object.oid,
-                     &head->tree->object.oid,
+       diff_tree_oid(get_commit_tree_oid(origin),
+                     get_commit_tree_oid(head),
                      "", &opts);
        diffcore_std(&opts);
        diff_flush(&opts);