Revision 427819

graphics/ImageMagick7: Update to 7.0.3-7

Summarized ChangeLog since 7.0.2-9:

  * Off by one memory allocation (reference
    https://github.com/ImageMagick/ImageMagick/issues/296).
  * The -extent option now matches the results of IMv6 (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=30779).
  * Prevent fault in MSL interpreter (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=30797).
  * Mask composite produces proper results for the convert utility (reference
    http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=29675).
  * Added layer RLE compression to the PSD encoder.
  * Fixed incorrect parsing with ordered dither. (reference
    https://github.com/ImageMagick/ImageMagick/issues/254)
  * Unit test pass again after small SUN image patch.
  * Fixed incorrect RLE decoding when reading a DCM image that contains
    multiple segments.
  * Fixed incorrect RLE decoding when reading an SGI image (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=30514)
  * Added layer RLE compression to the PSD encoder.
  * Added define 'psd:preserve-opacity-mask' to preserve the opacity mask
    in a PSD file.
  * Fixed issue where the display window was used instead of the data window
    when reading EXR files (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&p=137849).
  * Fixed reading DXT1 images with an alpha channel.
  * Fixed incorrect padding calculation in PSD encoder.
  * Added define 'psd:additional-info' to preserve the additional information
    in a PSD file.
  * Prevent buffer overflow in BMP & SGI coders (bug report from
    pwchen&rayzhong of tencent).
  * Prevent buffer overflow and other problems in SIXEL, PDB, MAP, TIFF and
    CALS coders (bug report from Donghai Zhu).
  * The -stream option now increments the pixel pointer properly (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=30327).

PR:		214511
MFH:		2016Q4