Check for closed stream before upload in git_sync_cl_chain

Change-Id: Ib66b442c5959583e07c12821e851f3491cf0247e
diff --git a/tools/git_sync_cl_chain.py b/tools/git_sync_cl_chain.py
index 5a229bd..66713fa 100755
--- a/tools/git_sync_cl_chain.py
+++ b/tools/git_sync_cl_chain.py
@@ -126,7 +126,7 @@
       has_seen_open_branch = True
       has_seen_local_branch = has_seen_local_branch or (status == 'None')
 
-      if options.upload:
+      if options.upload and status != 'closed':
         if has_seen_local_branch:
           print(
               'Cannot upload branch %s since it comes after a local branch'