[PATCH] Update the tracking references only if they were succesfully updated on remote

[Alex Riesen <raa.lkml@gmail.com>]

It fixes the bug where local tracing branches were filled with zeroed SHA-1
if the remote branch was not updated because, for instance, it was not
an ancestor of the local (i.e. had other changes).

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
---

Jeff, I think your change (334f4831e5a77) was either not complete or
got broken some time later.

 send-pack.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/send-pack.c b/send-pack.c
index b74fd45..d56d980 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -349,7 +349,8 @@ static int send_pack(int in, int out, struct remote *remote, int nr_refspec, cha
 
 	if (!dry_run && remote && ret == 0) {
 		for (ref = remote_refs; ref; ref = ref->next)
-			update_tracking_ref(remote, ref);
+			if (!is_null_sha1(ref->new_sha1))
+				update_tracking_ref(remote, ref);
 	}
 
 	if (!new_refs && ret == 0)
-- 
1.5.3.5.648.g1e92c