Fix a SIGABRT in pdb file handling bug: https://github.com/ImageMagick/ImageMagick/issues/148 bug-ubuntu: https://bugs.launchpad.net/ubuntu/+source/imagemagick/+bug/1556273 origin: upstream, https://github.com/ImageMagick/ImageMagick/commit/53c1dcd34bed85181b901bfce1a2322f85a59472 bug-debian: https://bugs.debian.org/823750