builtin-help: fallback to GIT_MAN_VIEWER before man

diff --git a/log-tree.c b/log-tree.c
index bd8b9e45ab46b8664c8b7016b33bee22f86c9e0d..30cd5bb22800f5e897c1170e97721a4dcdb9c9d2 100644 (file)
--- a/log-tree.c
+++ b/log-tree.c
@@ -432,7 +432,7 @@ static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log
        struct commit_list *parents;
        unsigned const char *sha1 = commit->object.sha1;
 
-       if (!opt->diff)
+       if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
                return 0;
 
        /* Root commit? */