Security update for ImageMagick (moderate)

This update for ImageMagick fixes the following issues:

Security issues fixed:

• CVE-2018-14434: A memory leak for a colormap in WriteMPCImage
  incoders/mpc.c was fixed. (bsc#1102003)
• CVE-2018-14435: A memory leak in DecodeImage in coders/pcd.c was fixed.
  (bsc#1102007)
• CVE-2018-14436: A memory leak in ReadMIFFImage in coders/miff.c was
  fixed. (bsc#1102005)
• CVE-2018-14437: A memory leak in parse8BIM in coders/meta.c was fixed.
  (bsc#1102004)

Bug fix:

• bsc#1094741: Fix unexpected result with convert -compose.

This update was imported from the SUSE:SLE-15:Update update project.