* XBM coder leaves the hex image data uninitialized if hex value of the
pixel is negative.
* More improvements to SVG text handling.
* New -range threshold option that combines hard and soft thresholding.
* Non-HDRI ScaleLongToQuantum() private method no longer adds a half interval.
* Fixed memset() negative-size-param (reference
https://github.com/ImageMagick/ImageMagick/issues/1217).
* Fixed numerous use of uninitialized values, integer overflow, memory
exceeded, and timeouts (credit to OSS Fuzz).
OBS-URL: https://build.opensuse.org/package/show/graphics/ImageMagick?expand=0&rev=375
