Forgot to attach the patch. Sorry.

2015-02-04 20:11 GMT-02:00 Artur Malabarba <bruce.connor.am@gmail.com>:
> Given how similar docview and image-mode are, I'm always taken
> off-guard when I run into a small difference. This patch fixes one.
>
> k kills the buffer in docview, and I see no reason why it wouldn't do
> the same in image-mode. If nobody opposes this patch I'll merge it
> myself.
>
> Cheers to all,