[PATCH 5/9] refs/packed-backend.h: add missing declaration (hdr-check)

[Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxxx>]

Signed-off-by: Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxxx>
---
 refs/packed-backend.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/refs/packed-backend.h b/refs/packed-backend.h
index 640245d3b9..a01a0aff9c 100644
--- a/refs/packed-backend.h
+++ b/refs/packed-backend.h
@@ -1,6 +1,8 @@
 #ifndef REFS_PACKED_BACKEND_H
 #define REFS_PACKED_BACKEND_H
 
+struct ref_transaction;
+
 /*
  * Support for storing references in a `packed-refs` file.
  *
-- 
2.19.0