kaspdb: fix compiler warning "control reaches end of non-void function"

diff --git a/src/knot/dnssec/kasp/kasp_db.c b/src/knot/dnssec/kasp/kasp_db.c
index 7441d6eba2eeb6f56d439dda6b894638cf007eee..ba684ed9c31faf119b83e5659275b7338176ab79 100644 (file)
--- a/src/knot/dnssec/kasp/kasp_db.c
+++ b/src/knot/dnssec/kasp/kasp_db.c
@@ -53,6 +53,10 @@ static MDB_val make_key_str(keyclass_t kclass, const knot_dname_t *dname, const
                } else {
                        return knot_lmdb_make_key("BNS", (int)kclass, dname, str);
                }
+       default:
+               assert(0);
+               MDB_val empty = { 0 };
+               return empty;
        }
 }