Fixed head buffer overflow in psd file
bug: https://github.com/ImageMagick/ImageMagick/issues/98
origin: upstream,
https://github.com/ImageMagick/ImageMagick/commit/5f16640725b1225e6337c62526e6577f0f88edb8
bug-ubuntu:
https://bugs.launchpad.net/ubuntu/+source/imagemagick/+bug/1537424
bug-debian: https://bugs.debian.org/823750
