Fix last delete from a subpage

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 21d468b..6f279e3 100644 (file)
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -3843,7 +3843,7 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
                        }
                        rc = mdb_cursor_del(&mc->mc_xcursor->mx_cursor, 0);
                        /* If sub-DB still has entries, we're done */
-                       if (mc->mc_xcursor->mx_db.md_root != P_INVALID) {
+                       if (mc->mc_xcursor->mx_db.md_entries) {
                                if (leaf->mn_flags & F_SUBDATA) {
                                        /* update subDB info */
                                        MDB_db *db = NODEDATA(leaf);