ImageMagick: Heap Buffer Over-Read of a 4 bytes in distort operation.

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-47 and 7.1.2-22, when performing a polynomial distortion an out of bounds over-read of 24 bytes can occur when specifying specific arguments. This issue has been patched in versions 6.9.13-47 and 7.1.2-22.