refs.c: make sure log_ref_setup returns a meaningful errno

diff --git a/refs.h b/refs.h
index 65f76376fe9953dab7aa1588d21bcefba2e74ad5..82cc5cb2a1690d7c8317746c6eb03ef1db7c55db 100644 (file)
--- a/refs.h
+++ b/refs.h
@@ -158,7 +158,9 @@ extern void unlock_ref(struct ref_lock *lock);
 /** Writes sha1 into the ref specified by the lock. **/
 extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
 
-/** Setup reflog before using. **/
+/*
+ * Setup reflog before using. Set errno to something meaningful on failure.
+ */
 int log_ref_setup(const char *refname, char *logfile, int bufsize);
 
 /** Reads log for the value of ref during at_time. **/