ez: fix regression when running b4 trailers

Do not crash when one of the msgs is a None (usually, the cover commit).

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/b4/ez.py b/b4/ez.py
index a6f25ed..c0380d4 100644
--- a/b4/ez.py
+++ b/b4/ez.py
@@ -576,6 +576,8 @@ def update_trailers(cmdargs: argparse.Namespace) -> None:
     by_subject = dict()
     updates = dict()
     for commit, msg in patches:
+        if not msg:
+            continue
         commit_map[commit] = msg
         body = msg.get_payload()
         patchid = b4.LoreMessage.get_patch_id(body)