MFH: r427819

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

Approved by: ports-secteam (with hat)