bug#13867: 24.3.50; reading certain emails containing images in mu4e causes segfault

[Nicolas Avrutin]

I found a good way to reproduce it!

emacs -Q
(imagemagick-register-types)
(insert-image (create-image "/tmp/PNG_transparency_demonstration_2.png" 
'imagemagick))

The segfault appears to happen on all PNGs with transparency. In
particular, the image I used was [1]. PNGs without transparency are inserted 
fine.

The ImageMagick source used in the Arch package (and the one I compiled
with debug symbols) is [2].

Footnotes: 
[1]  http://en.wikipedia.org/wiki/File:PNG_transparency_demonstration_2.png

[2]  
ftp://ftp.sunet.se/pub/multimedia/graphics/ImageMagick/ImageMagick-6.8.2-3.tar.xz
 

-- 
Nicolas Avrutin