bug#8870: Package installer corrupts image & zip files

[Chong Yidong]

Jambunathan K <kjambunathan@gmail.com> writes:

> Chong Yidong <cyd@stupidchicken.com> writes:
>
>> Jambunathan K <kjambunathan@gmail.com> writes:
>>
>>> tar-untar-buffer needs to use the right coding system for
>>> extraction.
>>
>> Could you verify that a standalone `M-x tar-untar-buffer' (called
>> outside of package.el) also exhibits the bug?
>
> Yes, the standalone `M-x tar-untar-buffer' ALSO corrupts the zip and png
> files.

Thanks for checking.  I've committed the change.