Avoid a SIGABRT in sun file handling This is a partial fix for malformed sun file
Bug: http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=26857 Bug-debian: https://bugs.debian.org/832465 Origin: upstream, https://github.com/ImageMagick/ImageMagick/commit/8ea44b48a182dd46d018f4b4f09a5e2ee9638105