ImageMagick: heap-based buffer over-read at MagickCore/threshold.c in AdaptiveThresholdImage because a width of zero is mishandled

A heap-based buffer over-read was discovered in ImageMagick in the way it selects an individual threshold for each pixel based on the range of intensity values in its local neighborhood due to a width of zero mishandle error. Applications compiled against ImageMagick libraries that accept...