never let bufferevent_rlim functions return negative

diff --git a/bufferevent_ratelim.c b/bufferevent_ratelim.c
index d32f63b3c8c9990f1f43c80fafef96ab85cf9923..afae2e3af14b5860df3c661cf98f08cce0860e36 100644 (file)
--- a/bufferevent_ratelim.c
+++ b/bufferevent_ratelim.c
@@ -245,6 +245,8 @@ _bufferevent_get_rlim_max(struct bufferevent_private *bev, int is_write)
                CLAMPTO(share);
        }
 
+       if (max_so_far < 0)
+               max_so_far = 0;
        return max_so_far;
 }