");   goto err;  }  /*   * Verify (and, if relevant, save off) page fields common to   * all PAGEs.   */  if((ret = __db_vrfy_datapage(dbp, vdp, h, pgno, flags)) != 0) {   if(ret == DB_VERIFY_BAD)    isbad = 0;   else    goto err;  }  /*   * 