struct ref_transaction: add a place for backends to store data

mhagger · gitster · commit 3bf4f56134c3 · 2017-09-09T03:18:03.000+09:00
`packed_ref_store` is going to want to store some transaction-wide
data, so make a place for it.

Signed-off-by: Michael Haggerty &lt;mhagger@alum.mit.edu&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/refs/refs-internal.h b/refs/refs-internal.h
@@ -242,6 +242,7 @@ struct ref_transaction {
 	size_t alloc;
 	size_t nr;
 	enum ref_transaction_state state;
+	void *backend_data;
 };
 
 /*
