admin/actions/config/action_node_publish gives an error about invalid foreach

If you go to the above URL, an error is printed about an invalid foreach in action.module line 190. I noted the params column in my actions table is empty, hence the foreach in question is getting an empty string. Accordingly, I made the following change, and the error went away.

***************
*** 187,194 ****
      $function = $data->func;
      $edit['action'] = md5($data->func);
      $params = unserialize($data->params);
!     foreach ($params as $name => $val) {
!       $edit[$name] = $val;
      }
    }
    else {
--- 187,196 ----
      $function = $data->func;
      $edit['action'] = md5($data->func);
      $params = unserialize($data->params);
!     if ($params) {
!       foreach ($params as $name => $val) {
!         $edit[$name] = $val;
!       }
      }
    }
    else {