Implement -used.

This doesn't agree with find's output, but I think find is buggy here.
For example, find -used +0 is returning fewer results than find -used 1,
which makes no sense given that 1 is greater than 0.

1 files changed, 1 insertions, 0 deletions

diff --git a/bfs.h b/bfs.h
index 3a85650..1e38869 100644
--- a/bfs.h
+++ b/bfs.h
@@ -187,6 +187,7 @@ bool eval_access(const struct expr *expr, struct eval_state *state);
 
 bool eval_acmtime(const struct expr *expr, struct eval_state *state);
 bool eval_acnewer(const struct expr *expr, struct eval_state *state);
+bool eval_used(const struct expr *expr, struct eval_state *state);
 
 bool eval_gid(const struct expr *expr, struct eval_state *state);
 bool eval_uid(const struct expr *expr, struct eval_state *state);