It is only necessary to clear the lock_file's filename field if it was
not already clear.

Signed-off-by: Michael Haggerty <mhag...@alum.mit.edu>
---
 lockfile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lockfile.c b/lockfile.c
index 8fbcb6a..d26711f 100644
--- a/lockfile.c
+++ b/lockfile.c
@@ -277,6 +277,6 @@ void rollback_lock_file(struct lock_file *lk)
                if (lk->fd >= 0)
                        close(lk->fd);
                unlink_or_warn(lk->filename);
+               lk->filename[0] = 0;
        }
-       lk->filename[0] = 0;
 }
-- 
1.9.0

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