[JGIT PATCH 8/8] Don't try to pack 0{40} during push of delete and update

["Shawn O. Pearce" <spearce@spearce.org>]

`jgit push origin :refs/heads/die refs/heads/master` tries to pack
0{40} to delete branch "die" while also packing the objects needed
to update branch master.  Since "die" is being removed we do not
want to pack any objects for it, as there is nothing to pack.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
---
 .../jgit/transport/BasePackPushConnection.java     |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/org.spearce.jgit/src/org/spearce/jgit/transport/BasePackPushConnection.java b/org.spearce.jgit/src/org/spearce/jgit/transport/BasePackPushConnection.java
index 7ae3aa7..784a578 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/transport/BasePackPushConnection.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/transport/BasePackPushConnection.java
@@ -169,8 +169,10 @@ class BasePackPushConnection extends BasePackConnection implements
 
 		for (final Ref r : getRefs())
 			remoteObjects.add(r.getObjectId());
-		for (final RemoteRefUpdate r : refUpdates.values())
-			newObjects.add(r.getNewObjectId());
+		for (final RemoteRefUpdate r : refUpdates.values()) {
+			if (!ObjectId.zeroId().equals(r.getNewObjectId()))
+				newObjects.add(r.getNewObjectId());
+		}
 
 		writer.preparePack(newObjects, remoteObjects, thinPack, true);
 		writer.writePack(out);
-- 
1.5.6.74.g8a5e