Log Message:
Update GraphicsMagick to 1.3.3.

1.3.3 (December 9, 2008)
========================

Security Fixes:

  * None.

Bug fixes:

  * 'identify' was throwing an assertion when used on colormapped
    files (this bug was introduced by 1.3.2).

  * With the -segment option, eliminate trashing the image colors when
    used on huge images.

  * 'identify -format "%c"' now reports the entire comment regardless
    of size.

  * Argument to -convolve is no longer arbitrarily truncated so huge
    convolution kernels may now be specified from the command line.

Performance Improvements:

  * Image segmentation (-segment) is now accelerated using OpenMP and
    uses several other tactics to improve execution performance.

  * 'identify "*"' now successfully works in a 32-bit application when
    used in a directory containing a million files.

  * 'identify' now executes quickly when used on TIFF files.