[dvipdfmx] Segmentation fault on pdfencoding

[Shunsaku Hirata]

It's true that with the suggested patch segmentation fault can be avoided, but it is not appropriate one.

Shunsaku Hirata

> 2021/06/02 23:28、Hironobu Yamashita <h.y.acetaminophen at gmail.com>のメール:
> 
> Hi Masamichi,
> 
>> The following TeX source causes a segmentation fault in dvipdfmx.
> 
> Thanks for the report; a segmentation fault is definitely undesirable
> so I installed your patch (r59429).
> Anyone - please report if you find any problem with the change.
> 
> Best,
> Hironobu