Any -bench command results in a segmentation violation

[Hubbitus]

Hello.

Please look at https://bugzilla.redhat.com/show_bug.cgi?id=984697

[glennrp]

The test should be writing to "null:" not "null". Without the colon it is an actual
file named "null" which on my platform defaults to GIF format. If multiple threads
are trying to write to the same GIF, I would not be surprised to see a crash, although
it didn't crash for me (running ImageMagick-6.8.6-4 with one thread).

[magick]

Find a patch @ http://www.imagemagick.org/ImageMagick- ... enmp.patch.

[Hubbitus]

Thank you.