[security fix] New version of imagemagick targetting experimental

[Bastien ROUCARIES <roucaries.bastien@gmail.com>]

Hi,

I have just uploaded a new version of imagemagick fixing some
security/potential FTBS bug.

The fix are minimal in order to not disturb so bump transition (backport).

Vincent is my usual sponsor but seems in vacation.

Please sponsor my package
http://mentors.debian.net/package/imagemagick
DSC here:
http://mentors.debian.net/debian/pool/main/i/imagemagick/imagemagick_6.7.4.0-2.dsc

Will try ASAP to get stable fixed.

Thanks

Bastien