fix refcount leak in LRU bump buf

takes a long time for mc-crusher to find this. I didn't run it long enough :(

1 files changed, 3 insertions, 0 deletions

diff --git a/items.c b/items.c
index b5f1fe9..78be101 100644
--- a/items.c
+++ b/items.c
@@ -1142,6 +1142,9 @@ static bool lru_bump_async(lru_bump_buf *b, item *it, uint32_t hv) {
         ret = false;
         b->dropped++;
     }
+    if (!ret) {
+        refcount_decr(it);
+    }
     pthread_mutex_unlock(&b->mutex);
     return ret;
 }