message: Fix gdbinit again
diff: @@ -90,8 +90,8 @@ define co_bt
  if $argc > 0
  set $cid = (int) $arg0
  else
  - if swoole::Coroutine::current
  - set $cid = swoole::Coroutine::current->cid
  + if 'swoole::Coroutine::current'
  + set $cid = (int) 'swoole::Coroutine::current->cid'
  else
  set $cid = -1
  end
  