Subject: 25.1.50; image-mode ignore the image :scale

From: Tino Calancha <[email-masked]>
Date: Thu, 8 Sep 2016 21:14:26 +0900 (JST)

emacs -Q IMAGE ; IMAGE is the file name of an image file
M-x: image-transform-fit-to-width
;; assertion fails.  The image width is bigger than the window width.

This happens after commit: ad1951db

In GNU Emacs 25.1.50.1 (x86_64-pc-linux-gnu, GTK+ Version 3.21.5)
  of 2016-09-07
Repository revision: ba5d32398ba42fcf14ad5242d95c68133981744f