ITS#9007 don't free loose writemap pages

Broken in ITS#8756

libraries/liblmdb/mdb.c

@@ -3693,9 +3693,9 @@ mdb_freelist_save(MDB_txn *txn)
 			} else {
 				x = mdb_mid2l_search(dl, mp->mp_pgno);
 				mdb_tassert(txn, dl[x].mid == mp->mp_pgno);
+				mdb_dpage_free(env, mp);
 			}
 			dl[x].mptr = NULL;
-			mdb_dpage_free(env, mp);
 		}
 		{
 			/* squash freed slots out of the dirty list */