Security update for ImageMagick (moderate)

This update for ImageMagick fixes the following issues:

Security issues fixed:

• CVE-2018-18024: Fixed an infinite loop in the ReadBMPImage function.
  Remote attackers could leverage this vulnerability to cause a denial
  of service via a crafted bmp file. (bsc#1111069)
• CVE-2018-18016: Fixed a memory leak in WritePCXImage (bsc#1111072).
• CVE-2018-17966: Fixed a memory leak in WritePDBImage (bsc#1110746).

Non security issues fixed:

• Fixed -morphology EdgeIn output (bsc#1106254)

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