refs: mark ref_transaction_update_reflog() as static

The `ref_transaction_update_reflog()` function is only used within
'refs.c', so mark it as static.

Reported-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: KarthikNayak

refs.c

@@ -1270,13 +1270,21 @@ int ref_transaction_update(struct ref_transaction *transaction,
 	return 0;
 }
 
-int ref_transaction_update_reflog(struct ref_transaction *transaction,
-				  const char *refname,
-				  const struct object_id *new_oid,
-				  const struct object_id *old_oid,
-				  const char *committer_info, unsigned int flags,
-				  const char *msg, unsigned int index,
-				  struct strbuf *err)
+/*
+ * Similar to`ref_transaction_update`, but this function is only for adding
+ * a reflog update. Supports providing custom committer information. The index
+ * field can be utiltized to order updates as desired. When not used, the
+ * updates default to being ordered by refname.
+ */
+static int ref_transaction_update_reflog(struct ref_transaction *transaction,
+					 const char *refname,
+					 const struct object_id *new_oid,
+					 const struct object_id *old_oid,
+					 const char *committer_info,
+					 unsigned int flags,
+					 const char *msg,
+					 unsigned int index,
+					 struct strbuf *err)
 {
 	struct ref_update *update;
 

refs.h

@@ -727,20 +727,6 @@ int ref_transaction_update(struct ref_transaction *transaction,
 			   unsigned int flags, const char *msg,
 			   struct strbuf *err);
 
-/*
- * Similar to`ref_transaction_update`, but this function is only for adding
- * a reflog update. Supports providing custom committer information. The index
- * field can be utiltized to order updates as desired. When not used, the
- * updates default to being ordered by refname.
- */
-int ref_transaction_update_reflog(struct ref_transaction *transaction,
-				  const char *refname,
-				  const struct object_id *new_oid,
-				  const struct object_id *old_oid,
-				  const char *committer_info, unsigned int flags,
-				  const char *msg, unsigned int index,
-				  struct strbuf *err);
-
 /*
  * Add a reference creation to transaction. new_oid is the value that
  * the reference should have after the update; it must not be