bug#21870: 25.0.50; image now shown after decrypting image file

[Eli Zaretskii]

> From: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
> Date: Tue, 10 Nov 2015 10:30:44 +0200
> 
> It seems the auto-decryption functionality does not work correctly for
> encrypted images - that is, decryption works, but then the image is not
> shown.
> 
> Steps to reproduce:
> 1) Open an encrypted image file (say, test.jpeg.gpg)
> 2) Enter the passphrase, when asked (by easypg I assume)
> 3) Now, see a small rectangle in the upper left of the current window;
>    instead of the expected image
> 
> Expected behavior would be to see the image, just as if opening
> test.jpeg directly.

If you do the same with a different kind of file, does Emacs activate
the correct major mode after decrypting the file?